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NEET Biology Solved Question Paper 2016

Multiple Choice Questions

51.

In case of pregnancy, the heartbeat of embryo starts at

4th week
7th week
6th week
5th week

5th week

On the 5th week of pregnancy a large tube (premitive heart) starts to beat and pump blood in embryo.

52.

Which one of the following options is not a sexually transmitted disease?

AIDS
Hepatitis-B
Pertussis
Syphilis

Pertussis

Pertussis (a whooping cough) is not a Sexually Transmitted Disease (STD), while other diseases are transmitted by sexual relationships.

53.
Consider these sentences regarding to the structure and nature of DNA.
(I) DNA has tow pyrimidine bases which contain single ring structure.
(II) In DNA, the composition of bases should be $\frac{A + T}{G + C} = 1$
(III) Each base pair of DNA is 3.4Å apart from the base pair.
(IV) The nucleosome model DNA packaging was proposed by Kornberg and Thomas.

I and III

I, II and III

II, III and IV

I, III and IV

I, III and IV

Erwin Chargaff (1950) made quantitative analysis of DNA and showed that the composition of DNA molecules varies in complex ways depending upon the source of DNA. He proposed Base Equivalence rule or Chargaff's rule, which states that for double-stranded DNA, the proportion of adenine always equals to that of thymine and proportion of guanine always equals to that of cytosine.
i.e. A=T and G=C.

It follows that, an equal proportion of purines and pyrimidines is always seen in a double-stranded DNA
i.e.

$A + G = T + C or \frac{A + G}{T + C} = 1$

54.

Match the following Columns

Column I (Pollination Technique)	Column II (Pollinator)
A. Cheiropterophily	1. Ant
B. Anemophily	2. Bat
C. Myrmecophily	3. Snail
D. Malaciphily	4. Wind

A – 3; B – 2; C – 1; D – 4
A – 2; B – 4; C – 1; D – 3
A – 4; B – 3; C – 2; D – 1
A – 1; B – 3; C – 2; D – 4

A – 2; B – 4; C – 1; D – 3

Pollination Techniques	Pollinator
Chiropterophily	Bat
Anemophily	wind
Myrmecophily	Ant
Malacophily	Snail

55.

The fact that DNA is a genetic material was established by the experiment of

Meselson and Stahl
Hershey and Chase
Avery, Macleod and McCarty
Rosalind Franklin and Kornberg

Hershey and Chase

The experiment of Hershey and Chase by bacteriophage first time proved that DNA is a genetic material.

56.

Pappus helps in the dispersal of pollen in

Asteraceae
Brassicaceae
Malvaceae
Solanaceae

Asteraceae

Pappus are modified bracts of Asteraceae family.These hairy structures help in dispersal of pollen by
wind.

57.

The term ‘prebiotic’ soup’ for organic water containing mixture of simple organic compounds was given by

Richter
Haldane
Arrhenius
Miller

Haldane

The term 'prebiotic soup' is used by Haldane for organic water containing a mixture of simple organic compounds during the early stage of origin of life.

58.

Number of Barr body which will found in case of Turner’s syndrome will be

1
2
0
Can't be determined by given data

The number of barr body in human = one less than the number of x Chromosome. In case of Turner syndrome 45(44+ X) chromosomes are found. So number of Barr bodies will be-zero.