Roll No:
Application No:
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Exam Date: 05-Oct-2020
Exam Time: 15:00-18:00
Examination: 1. Course Code - M.A./M.Sc./M.C.A.
2. Field of Study - LIFE SCIENCE (SLSM)
SECTION 1 - SECTION 1
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Question No.1 (Question Id - 16)
Which one of the following organisms produces aflatoxin ?
(A) Bacillus cereus
(B) Aspergillus flavus (Correct Answer)
(C) Rhodospirillum rubrum
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(D) Cladosporium flavum
Question No.2 (Question Id - 9)
In Arabidopsis thaliana, a gene called LEAFY (LFY) encodes transcription factor LFY. Plants with LFY mutation :
A. Do not make leaves beyond rosette stage.
B. They make sterile flowers.
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C. They show altered phyllotaxy.
D. They show delayed flowering.
Choose the most appropriate answer from the options given below :
(A) A and C Only
(B) A and D Only
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(C) B and C Only
(D) B and D Only (Correct Answer)
Question No.3 (Question Id - 67)
Which one of the following statements with respect to amphibian development is true ?
(A) It follows meroblastic, superficial cleavage pattern.
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(B) Gastrulation begins with invagination of bottle cells followed by the coordinated involution of mesoderm cells. (Correct Answer)
(C) The dorsal-most vegetal (endodermal) cells mark the 'organizer'.
(D) The ventral-most vegetal (endodermal) cells mark the 'organizer'.
Question No.4 (Question Id - 96)
Among the following cells, which one is the longest living in perennial trees ?
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(A) Cork cambium
(B) Phloem parenchyma
(C) Ray parenchyma (Correct Answer)
(D) Xylem parenchyma
Question No.5 (Question Id - 12)
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Which of the following strains of Escherichia coli can function as donors of F factor :A. F+
B. Hfr
C. F-
D. F'
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Choose the most appropriate answer from the options given below:
(A) A, C and D Only
(B) A, B and C Only
(C) A, B and D Only (Correct Answer)
(D) B, C and D Only
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Question No.6 (Question Id - 48)
Given below are two statements :
Statement I:
Cell cycle checkpoints are essential only when cells are stressed or damaged.
Statement II:
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Cell cycle checkpoints may also act during a normal cell cycle to ensure proper coordination of events.In the light of the above statements, choose the most appropriate answer from the options given below:
(A) Both Statement I and Statement II are correct
(B) Both Statement I and Statement II are incorrect
(C) Statement I is correct but Statement II is incorrect
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(D) Statement I is incorrect but Statement II is correct (Correct Answer)
Question No.7 (Question Id - 38)
The below question has been dropped and full marks are awarded.
Nucleotides consist of a purine or pyrimidine base linked to the
(A) 1' carbon of a pentose sugar having a phosphate group on 5' carbon.
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(B) 2' carbon of a pentose sugar having a phosphate group on 5' carbon.
(C) 5'carbon of a pentose sugar having a phosphate on either of the 5' or 3' carbon.
(D) 1' carbon of a pentose sugar having a phosphate group on the 3' carbon.
Question No.8 (Question Id - 86)
Which of the following equation is not correct?
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(A) cos² x + sin²x = 1
(B) cos [p/2 + x] = - sin x
(C) cos [2p - x] = - cos x (Correct Answer)
(D) sin [2p - x] = - sin x
Question No.9 (Question Id - 26)
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Which of the following statements is incorrect:A. Glycolysis involves conversion of a 6 carbon glucose to two molecules of 3 carbon pyruvate.
B. For each glucose molecule converted, 4 molecules of ATP is the net yield of glycolysis.
C. In eukaryotic cells, the citric acid cycle takes place in the cytosol.
D. Both NADPH and NADH are electron donors and function in interchangeable manner.
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Choose the most appropriate answer from the answer given below :
(A) B Only
(B) C Only
(C) B and C Only
(D) B, C, D Only (Correct Answer)
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Question No.10 (Question Id - 78)
Match the properties of light in List - I with the phenomena given in List - II
| List - I | List - II |
|---|---|
| A. Reflection | I. Light added to light produces darkness |
| B. Refraction | II. Change in path of light due to change in medium |
| C. Interference | III. Change in the path of the light without change in the medium |
| D. Polarization | IV. Restricting the vibrations of electric vector in a particular direction |
Choose the correct answer from the options given below:
(A) A-I, B - III, C - IV, D - II
(B) A-II, B - III, C - IV, D - I
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(C) A-III, B - II, C - I, D - IV (Correct Answer)
(D) A - IV, B - III, C - II, D - I
Question No.11 (Question Id - 83)
What is the value of ?23 x² dx?
(A) 7/3
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(B) 19/3 (Correct Answer)
(C) 5
(D) 9
Question No.12 (Question Id - 43)
Which of the following statements regarding DNA as a genetic material are true :
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A. DNA replication is semiconservative.
B. DNA replication is discontinuous in both strands.
C. The coding sequences or expressed sequences are called introns.
D. Eukaryotic DNA is polycistronic.
E. The DNA dependent DNA polymerase catalyses polymerization in 5'-3' direction.
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Choose the most appropriate answer from the options given below :
(A) A, B, E Only
(B) A, B, C Only
(C) A, B, C, D Only
(D) A, E Only (Correct Answer)
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Question No.13 (Question Id - 39)
During DNA replication, RNA primer is removed by :
(A) 3' exonuclease of DNA polymerase I
(B) Ribonuclease H (Correct Answer)
(C) Ribonuclease A
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(D) ? (epsilon) subunit of DNA Polymerase III
Question No.14 (Question Id - 87)
Find the equation of a curve passing through the point (-2, 3), given that the slope of the tangent to the curve at any point (x, y) is 2x/y².
(A) y = [3x² + 15]1/3 (Correct Answer)
(B) y = [3x + 15]1/3
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(C) y = [3x² + 15]1/2
(D) y = [3x3 + 15]1/3
Question No.15 (Question Id - 93)
Arrange the following in the decreasing order of the amount of water absorbed or excreted in alimentary canal.
(A) Colon > ilium > jejunum > faeces
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(B) Jejunum > ilium > colon > faeces (Correct Answer)
(C) Faeces > jejunum > ilium > colon
(D) Colon > jejunum > ilium > faeces
Question No.16 (Question Id - 89)
A committee of 3 persons is to be constituted from a group of 2 men and 3 women. How many combinations are possible for making a committee which would consist of 1 man and 2 women ?
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(A) 3
(B) 4
(C) 6 (Correct Answer)
(D) 7
Question No.17 (Question Id - 95)
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Insulin facilitates the entry of glucose into:(A) Mucosa of small intestine
(B) Neurons in the cerebral cortex
(C) Renal tubular cells
(D) Skeletal muscles (Correct Answer)
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Question No.18 (Question Id - 80)
Which of the following expression is the correct?
(A) Universal gas constant (R)=8.3145 cal.K-1.mol-1.
(B) Boltzmann Constant (kB)=1.3807x10-23 J.K-1. (Correct Answer)
(C) Planck's constant (h)=6.6261x10-23 J.s.
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(D) Avogadro's number (N)=6.0221x1034 molecules.mol-1.
Question No.19 (Question Id - 5)
Match the descriptions given in (List - I) with the terms given in (List - II).
| List - I | List - II |
|---|---|
| A. Gravity sensing amyloplast | I. Statoliths |
| B. Gravity sensing cells | II. Starch sheath |
| C. Gravity sensing tissue | III. Statocytes |
| D. Gravity sensing organ | IV. Roots |
Choose the correct answer from the options given below :
(A) A-I, B - III, C - IV, D - II
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(B) A-I, B - III, C - II, D - IV (Correct Answer)
(C) A-IV, B - III, C - I, D - II
(D) A - IV, B - II, C - I, D - III
Question No.20 (Question Id - 58)
Which of the following are characteristic attributes of innate immune responses ?
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A. It is the first line of defence.
B. It involves antigen-specific receptors.
C. It is non-specific.
D. It shows variable response.
E. It shows the same response every time.
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Choose the most appropriate answer from the options given below:
(A) A, B and C Only
(B) A, C and E Only (Correct Answer)
(C) B, C and D Only
(D) B, D and E Only
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Question No.21 (Question Id - 15)
Which of the following statements are TRUE?
A. All bacteria have circular chromosome.
B. Bacteria can have circular or linear chromosome.
C. Bacteria can have more than one chromosome.
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D. Bacterial chromosome is separated from the rest of the cytoplasm by the nuclear membrane.
Choose the most appropriate answer from the options given below :
(A) A and B Only
(B) A and C Only
(C) B and C Only (Correct Answer)
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(D) B and D Only
Question No.22 (Question Id - 1)
Which plant family contributes to the highest calorific value to human diet?
(A) Poaceae (Correct Answer)
(B) Agaricaceae
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(C) Brassicaceae
(D) Fabaceae
Question No.23 (Question Id - 32)
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A:
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The partial diploid lacI? lacO? lacZ+ /lacI- lacOc lacZ- constitutively produces ß-galactosidase.Reason R :
Lac O is a cis-acting DNA element.
In the light of the above statements, choose the correct answer from the options given below :
(A) Both A and R are true and R is the correct explanation of A
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(B) Both A and R are true but R is NOT the correct explanation of A
(C) A is true but R is false
(D) A is false but R is true (Correct Answer)
Question No.24 (Question Id - 61)
TH1 and TH2 subset differentiation are mediated by cytokines as described below :
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(A) IL12, IFNy for TH1 and IL2 for TH2
(B) IL12, IFNy for TH1 and IL4 for TH2 (Correct Answer)
(C) IL4 for TH1 and IL12 and IFNy for TH2
(D) IL4 for TH1 and IFNy for TH2
Question No.25 (Question Id - 75)
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What is the energy of electromagnetic wave with the wavelength of 80 m? (where planck's constant h = 6.6 x 10-34 J.s)(A) 6.2 x 10-23 eV
(B) 8 x 108 eV
(C) 2.4 x 10-20 eV
(D) 1.6 x 10-8 eV (Correct Answer)
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Question No.26 (Question Id - 45)
A bacteriophage of genome size of 3000 bp was found to code for 5 unique polypeptides of 500, 300, 200, 150, 100 amino acids. This would suggest that the :
(A) phage has overlapping ORFs. (Correct Answer)
(B) phage mRNA is spliced.
(C) phage genome has repetitive sequence.
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(D) phage proteins are phosphorylated.
Question No.27 (Question Id - 42)
Protein synthesis occurs with high fidelity. Assuming that the incorrect amino acids are inserted at the rate of approximately 10-3. What is the probability that a polypeptide of 300 amino acids has exactly the same as that specified by the mRNA ?
(A) 3/4 (Correct Answer)
(B) 1/3
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(C) 1/2
(D) 1/5
Question No.28 (Question Id - 3)
Which of the following are micronutrients for plant ?
(A) Chlorine and magnesium
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(B) Iron and chlorine (Correct Answer)
(C) Iron and phosphorus
(D) Sulphur and phosphorus
Question No.29 (Question Id - 22)
Following are certain statements regarding the synthesis of NADH and NADPH. Identify the correct statement :
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(A) NADPH is produced in the TCA cycle and NADH is produced in the Pentose phosphate pathway.
(B) NADH is produced in the TCA cycle and NADPH is produced in the Pentose phosphate pathway. (Correct Answer)
(C) Both NADH and NADPH are produced in the TCA cycle but only NADH is produced in the Pentose phosphate pathway.
(D) NADH and NADPH are produced in both TCA cycle and Pentose phosphate pathway.
Question No.30 (Question Id - 2)
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The deadly disease of rust in wheat is caused by :(A) Pleurotus ostreatus
(B) Puccinia graminis (Correct Answer)
(C) Giberella fuzikuroi
(D) Claviceps purpurea
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Question No.31 (Question Id - 92)
Neck vertebrae in all birds are :
A. fixed in number
B. variable in number
C. membranous and calcified
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Choose the correct answer from the options given below:
(A) A and C Only
(B) B and D Only
(C) A Only
(D) B Only (Correct Answer)
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Question No.32 (Question Id - 52)
When Gita did actin polymerization experiments she found the pattern as seen in Figure I. But when she added another protein X, the pattern changed to as seen in Figure II. The name of the protein is:
(A) Actopheren
(B) Arp 2/3 (Correct Answer)
(C) Profilin
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(D) Cofilin
Question No.33 (Question Id - 63)
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A :
DNA vaccine utilizes plasmid DNA encoding antigenic proteins that are injected directly into the muscles of the recipient.
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Reason R :
The DNA is taken up by the dendritic cells and is able to induce both cell mediated and humoral immune response.
In the light of the above statements, choose the correct answer from the options given below :
(A) Both A and R are true and R is the correct explanation of A (Correct Answer)
(B) Both A and R are true but R is not the correct explanation of A
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(C) A is true but R is false
(D) A is false but R is true
Question No.34 (Question Id - 54)
In the severe haemolytic disease of the newborn called erythroblastosis fetalis which diagnostic test can be used to detect anti-Rh antibodies in mother's serum ?
(A) Direct Coombs Test
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(B) Indirect Coombs Test (Correct Answer)
(C) Rocket Immunoelectrophoresis
(D) Western blotting
Question No.35 (Question Id - 59)
Which of the following statements about the complement fixation are true ?
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A. C3 convertase in alternative pathway is C3bBb.
dzi tönvertasen'siassical pathway is C4b2a.
C. Both lectin pathway and alternative pathway are initiated by binding to C1q.
D. C1s has substrate C4 only.
E. C1q and C1s bind to Fc region of immune complex and induce conformation change in C1r.
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Choose the most appropriate answer from the options given below :
(A) A Only
(B) A, B Only (Correct Answer)
(C) A, B, C, E Only
(D) A, B, D Only
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Question No.36 (Question Id - 37)
Match the following description of the list of terms :
| List - I | List - II |
|---|---|
| A. BOD | I. Natural aging of a lake |
| B. Pioneer species | II. Biological Oxygen Demand |
| C. Eutrophication | III. Species that invade bare areas |
| D. Saprophytes | IV. Fungi |
Choose the correct answer from the options given below :
(A) A-II, B - I, C - III, D - IV
(B) A-II, B - IV, C - I, D - III
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(C) A-II, B - IV, C - III, D - I
(D) A-II, B - III, C - I, D - IV (Correct Answer)
Question No.37 (Question Id - 91)
Which of the following is the principal buffer in interstitial fluid ?
(A) Carbonic acid (Correct Answer)
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(B) Haemoglobin
(C) Other proteins
(D) H2PO4
Question No.38 (Question Id - 90)
Identify the correct statement regarding haemoglobin.
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(A) CO2 and CO bind to the same site on haemoglobin.
(B) CO2 and O2 bind to the same site on haemoglobin.
(C) O2 and CO bind to the same site on haemoglobin. (Correct Answer)
(D) O2 and CO bind to different sites on haemoglobin.
Question No.39 (Question Id - 6)
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Match the type of water movement (List - I) with their corresponding mode of transport (List - II) :| List - I | List - II |
|---|---|
| A. Apoplastic movement | I. From protoplast to protoplast via plasmodesmata |
| B. Symplastic movement | II. Via cell walls |
| C. Transcellular movement | III. Via hydathodes |
| D. Guttation movement | IV. From cell to cell with water passing through plasma membrane and tonoplasts |
Choose the correct answer from the options given below :
(B) A-I, B - II, C - III, D - IV
(C) A-II, B - I, C - IV, D - III (Correct Answer)
(D) A - IV, B - III, C - II, D - I
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Question No.40 (Question Id - 85)
What is the correct answer of the following integrals ?
? [(1 - sin x)/cos²x] dx.
(A) tan x - sec x + C (Correct Answer)
(B) sec x - tan x + C
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(C) sin x - cos x + C
(D) cos x - sin x + C
Question No.41 (Question Id - 25)
It appears that a signalling protein has a serine residue at position 96 that is phosphorylated upon the activation of the signal. To confirm this, you plan to replace it by another amino acid so that it loses its function (loss of function mutation). Which of the following amino acid would be of your choice for its replacement ?
(A) Threonine
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(B) Alanine (Correct Answer)
(C) Glycine
(D) Aspartic acid
Question No.42 (Question Id - 62)
Antigen pulsed peritoneal macrophages were taken from mouse strain H2b and antigen primed T cells from mouse strain H2k were added in the same well. T cell proliferation was assessed.
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(A) T cell proliferation will not occur. (Correct Answer)
(B) T cell proliferation will occur.
(C) T cell proliferation will occur only if there is stimulation along with adjuvants.
(D) Cannot assess with the given information since type of antigen is not specified.
Question No.43 (Question Id - 76)
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A radio transmitter operates at a frequency of 500 kHz with a power of 8 kw. How many photons are emitted per second (given Planck's constant h = 6.6 x 10-34 J.S) ?(A) 8 x 1016
(B) 3 x 1021
(C) 2.4 x 1032 (Correct Answer)
(D) 6.6 x 1034
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Question No.44 (Question Id - 14)
Match the organisms (List - I) with the corresponding diseases they cause (List - II).
| List - I | List - II |
|---|---|
| A. Escherichia coli | I. Urinary tract infection |
| B. Streptococcus pyogenes | II. Sore throat |
| C. Shigella flexneri | III. Gas gangrene |
| D. Clostridium perfringens | IV. Bacillary dysentry |
Choose the correct answer from the options given below :
(A) A-I, B - III, C - II, D - IV
(C) A-IV, B - II, C - III, D - I
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Question No.45 (Question Id - 88)
Which of the following is correct for the following differential equation
xy[d²y/dx²] + x[dy/dx]² - y[dy/dx] = 0.
(A) The highest order derivative present in the differential equation is dy/dx, so its order is one.
(B) The highest order derivative present in the differential equation is d²y/dx², so its order is two. (Correct Answer)
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(C) The highest order derivative present in the differential equation is dy/dx², so its order is one.
(D) The highest order derivative present in the differential equation is dy²/dx², so its order is one.
Question No.46 (Question Id - 30)
In cats curled ears result from allele Cut which is dominant over cu (normal ears). The allele B (black body) is dominant over b (gray body). A gray cat homozygous for curled ears was mated with a black cat homozygous for normal ears. The F1 progeny all had black body and curled ears. One of the F1 progeny was mated with a cat homozygous both for black body and normal ears. Which of the following statements is TRUE regarding the progeny of this cross ?
A. The ratio of curled ears to normal ears will be 3: 1
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B. The ratio of black body to gray body will be 1: 1
C. The ratio of curled ears to normal ears will be 1: 1
D. The ratio of black body to gray body will be 3: 1
Choose the most appropriate answer from the options given below :
(A) A and B Only
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(B) B and C Only (Correct Answer)
(C) C and
This download link is referred from the post: JNU Last 10 Years 2011-2021 Previous Question Papers with Answers
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