NDA & NA (II) 2017 Exam: GK Practice Questions – General Science - Set 03

For the benefit of NDA & NA (II) Exam 2017 aspirants Jagran Josh is providing practice questions on biology. The answers to the questions along with detailed explanations will help the aspirants in improving their scores in the General Science section of GAT paper. The questions are given below.

1.    Which statement about the cell cycle is not true?

a)    It consists of mitosis and interphase
b)    The cell’s DNA replicates during G1
c)    A cell can remain in G1 for weeks or much longer
d)    Most proteins are formed throughout all the sub phases of interphase.

Ans. (b) The cell’s DNA replicates during G1

2.    Spindle fibres are made of

a)    actin proteins and RNA
b)    cellulose and RNA
c)    tubulin protein and RNA
d)    both (a) and (c)

Ans. (c) tubulin protein and RNA

3.    The fibres which remain attached from one end of centriole to other end are called

a)    continuous fibres
b)    interzonal fibres
c)    chromosomal fibres
d)    inter-chromosomal fibres

Ans. (a) continuous fibres

4.    Types of coiling found during mitosis is

a)    plectonemic
b)    paranemic
c)    both of the above
d)    None of the above

Ans. (a) plectonemic

5.    When synapsis is complete all along the chromo¬some, the cell is said to have entered a stage called

a)    zygotene
b)    pachytene
c)    diplotene
d)    diakinesis

Ans. (a) zygotene

6.    The trigger protein which is required by cells to pass through restriction point is

a)    T-protein
b)    P-protein
c)    U-protein
d)    R-protein

Ans. (d) R-protein

7.     Parthenogenesis is defined as the

a) development of embryo without any fertilization
b) development of a fruit without any fertilization
c) development of a fruit without any hormones
d) development of an embryo from egg without any fertilization

Ans. (d) development of an embryo from egg without any fertilization

8.    The bouquet stage is observed in

a)    leptotene
b)    zygotene
c)    diplotene
d)    pachytene

Ans. (a) leptotene

9.    The histones associated with the genetic material apart from maintaining its configuration also act as

a)    modulators
b)    apozymes
c)    isozymes
d)    activators

Ans. (a) modulators

10.    The malarial fever starts

a)  Just after the mosquito bite
b) After the parasites reach the liver
c) After the bursting of RBCs
d) After the toxin is released by blood

Ans. (d) After the toxin is released by blood