ICMR JRF Practice Question Paper (Part 5)

(1). ABA catabolism is mediated by
a.       ABA-8’ carboxylase
b.      ABA-8’ hydroxylase
c.       ABA-8’ aminotransferase
d.      ABA-8’ oxygenase

(2). Nodulating genes in Rhizobium are influenced by the presence of which one of the following in the roots?
a.       Flavones
b.      Lignin
c.       Tannins
d.      Cellulose

(3). Which of the following techniques is used for the evaluation of phylogenetic trees?
a.       Null hypothesis
b.      Bootstrapping
c.       Chi-square
d.      Probability

(4). One PAM means one accepted point mutation per
a.       10² residues
b.      10 residues
c.       10³ residues
d.      10⁴ residues

(5). Intestinal flora cannot digest
a.       Cellulose
b.      Lignin
c.       Pectin
d.      Starch

(6). All of the following are malignant neoplasms except
a.       Papilloma
b.      Liposarcoma
c.       Squamous cell carcinoma
d.      Neroblastoma

(7). Replication of papillomavirus is restricted to
a.       Epithelial cells
b.      Nerve cells
c.       Fibroblasts
d.      Reticulo-endothelial cells

More Multiple Choice Questions (MCQs)...
BOTANY	BIOCHEMISTRY	BIOTECHNOLOGY
ZOOLOGY	CELL BIOLOGY	IMMUNOLOGY
ECOLOGY	MOLECULAR BIOLOGY	ANIMAL PHYSIOLOGY
GENETICS	BIOINFORMATICS	PLANT PHYSIOLOGY
EVOLUTION	BIOPHYSICS	DEVELOPMENTAL BIOLOGY
MICROBIOLOGY	BIOSTATISTICS	RESEARCH METHODOLOGY

(8). A mammalian cell has an outstretched double stranded DNA of 1.2 meters which duplicates in 4 hrs. If it duplicates at the rate of 20 µm/min, how many origins of replication are there in the DNA?
a.       2500
b.      250
c.       25
d.      1

(9). Cell cycle progression form one phase to another is primarily controlled by
a.       Phosphorylation of cyclin
b.      Proteolysis of cyclin
c.       Dephosphorylation of cylin
d.      Proteolysis of cylin dependent kinase

(10).  Elevation of intracellular inositol triphosphate (IP₃) results in the release of CA²⁺ from which of the following organelles?
a.       Mitochondria
b.      Smooth endoplasmic reticulum
c.       Peroxisome
d.      Golgi-complex

(11).  Sperm DNA is covered by
a.       Lipids
b.      Protamines
c.       Carbohydrates
d.      Histones

(12).  Resting membrane potential of a biological membrane is close to the  theoretical Nernst potential for the ions that are
a.       Least abundant
b.      Most abundant
c.       Impermeable
d.      Permeable

(13).  Testosterone hormone necessary for spermatogenesis is secreted by
a.       Sertoli cells
b.      Leyding cells
c.       Spermatozoa
d.      Cowpers gland

(14).  When Hrf strain of E.coli is crossed with F- strain, recombinants obtained are
a.       Always F+
b.      Always HFr+
c.       Rarely F+
d.      Rarely HFr+

(15).  Cholesterol contributes to which of the following properties of biological membranes?
a.       Membrane rigidity
b.      Membrane fluidity
c.       Membrane permeability
d.      Membrane osmolarity

ICMR JRF Model Questions  Part 1  | Part 2  |  Part 3 | Part 4  |  Part 5  | 

Answer key

1. Ans. (b). ABA-8’hydroxylase

2. Ans. (a). Flavones

3.  Ans. (b). Bootstrapping

4. Ans. (a). 10² residues

5. Ans. (d). Starch

6. Ans. (a). Papilloma

7. Ans. (a). Epithelial cells

8. Ans. (b). 250

9. Ans. (b). Proteolysis of cyclin

10. Ans. (b). Smooth endoplasmic reticulum

11. Ans. (b). Protamines

12. Ans. (d). Permeable

13. Ans. (b). Leyding cells

14. Ans. (c). Rarely F+

15. Ans. (b). Membrane fluidity

ICMR JRF Model Questions  Part 1  | Part 2  |  Part 3 | Part 4  |  Part 5  | 

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