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CSIR JRF NET Life Sciences Exam: December 2016: Model Question Paper- Set 1/5


csir net jrf december 2016 question paper

CSIR JRF NET Life Sciences Examination: December 2016
Model Question Paper with Answer Key and Explanations – Set 1/5

1. The metal component of Nitrogenase enzyme is:

a.       Mananese
b.      Molybdenum
c.       Copper
d.      Zinc

2. The only plant hormone which is NOT translocated from the cells producing it:

a.       Auxin
b.      Ethylene
c.       Cytokinin
d.      Gibberillic acid

3. Ribosomal rRNA in eukaryotes are transcribed by:

a.       RNA Polymerase I
b.      RNA Polymerase II
c.       RNA Polymerase III
d.      RNA Polymerase I and III

4. RNA-DNA hybrid always adopt A form because of:

a.       Steric hindrance of –OH group in RNA
b.      Steric hindrance of –OH group in DNA
c.       Coiling of the molecule
d.      Presence of Uracil base in RNA

5. Which plant is the most efficient converter of solar energy?

a.       Wheat
b.      Sugarcane
c.       Rice
d.      Banana

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NET Life Science June 2016 Model Question Paper Set- 5


net june 2016 solved paper

(1). Active site of all serine proteases consists of

a.       Ser-Glu-Asp
b.      Ser-Glu-Met
c.       Ser-His-Asp
d.      Ala-Glu-Met

(2). Which of the following properties is common to all cytoskeletal motor proteins like kinesisn, dyneins and myosins?

a.       GTPase activity
b.      ATPase activity
c.       Actin binding domain
d.      DNA binding domain

(3). Which of the following antibiotics attaches to 50S ribosome and inhibits peptidyl-transferase activity

a.       Penicillin
b.      Chloramphenicol
c.       Trimethoprim
d.      Amphotericin

(4). Increased genetic diversity following extended time in a tissue culture is a problem called

a.       Gene alternation
b.      Temporal modification
c.       Somaclonal variation
d.      Cultural shock

(5). To protrude plants that are homozygous for all traits, the best choice is

a.       Cell suspension culture
b.      Callus culture
c.       Anther/pollen culture
d.      Plant organ culture

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CSIR NET Question Paper Model (June 2016) Examination Part 4 with Answers & Explanations


net life science model question paper june 2016

Synthetic Herbicide Mechanism of Action

CSIR JRF NET Life Science Exam June 2016: Model (sample) Question Paper Set 4

(1). In pET expression vectors, high level of expression of cloned gene is achieved using

a.       T7 promoter
b.      SP6 promoter
c.       Λ-PL promoter
d.      Trp promoter

(2). Archaea is considered as a separate group from bacteria and eukaryotes, based on

a.       Genome sequence
b.      16S rRNA gene sequence
c.       23S rRNA gene sequence
d.      EFTu sequence

(3). A hybrid between species following by polyploidy or chromosome doubling is known as

a.       Auto-polyploidy
b.      Aneuploidy
c.       Haploid
d.      Allopolyploid

(4). The herbicide that kills plants by blocking the photosynthetic electron flow of photosystem-I is

a.       Diuron
b.      Paraquat
c.       Glyphosate
d.      Atrazine

(5). In submerged plants the root tip stimulates the activity of

a.       ACC synthase
b.      ACC oxidase
c.       ACC synthase and ACC oxidase
d.      ACC kinase

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CSIR JRF NET Life Sciences December 2015 Examination Model Question Paper with Answer Key and Explanations Part 02 (Biology MCQ 017)


Biology MCQ 017


NET December 2015 Model Question

(1). Arabidopsis and rice have diploid chromosome number of 10 and 24, respectively. Assuming no crossing over taking place, genetic variation among F2 individuals in a genetic cross is likely to be:

a. Same in both species but not zero
b. More in Arabidopsis
c. More in rice
d. Zero in both the species

(2). In tryptophan operon, tryptophan acts as:

a. Repressor
b. Activator
c. Co-repressor
d. Co-activator

(3). Which of the following statement is CORRECT?

a. Plants adapted to cold environment have higher ratio of ‘unsaturated to saturated’ fatty acids in their membrane compared to those adapted to hot environment
b. Plants adapted to cold environment have lower ratio of ‘unsaturated to saturated’ fatty acids in their membrane compared to those adapted to hot environment
c. Plants adapted to cold environment have same ratio of ‘unsaturated to saturated fatty acids in their membrane compared to those adapted to hot environment
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CSIR JRF NET December 2015 Examination: Life Sciences Model Question Paper with Answer Key and Explanations Part 01 (Biology MCQ 016)


Biology MCQ 016


CSIR NET JRF Life Sciences Free Online Coaching and Model Online Questions

(1). A electron microscope has higher resolution as compared to the light microscope. This is because:

a. The wavelength of an electron is longer than the wavelength of light
b. The wavelength of an electron is shorter than the wavelength of light
c. The electrons can penetrate the sample better
d. They use different stains

(2). Nucleolus is involved in the synthesis of:

a. rRNA
b. tRNA
c. DNA
d. mRNA

(3). When changes in the phenotype or gene expression occur without changes in the underlying DNA sequence, the phenomenon is called:

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