NTSE SAT Biology Papers 12

NTSE SAT Biology Papers 12

This is NTSE SAT Biology Papers 12.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
An animal cell, a plant cell and a bacterium share the following structural features:
  • A
    Cell membrane, endoplasmic reticulum, vacuoles
  • B
    Cell wall, plasma membrane, mitochondria
  • C
    Cell wall, nucleus, cytoplasm
  • D
    Plasma membrane, cytoplasm, ribosomes
    Correct
2
Given below are figures of three kinds of muscle fibres. Which one/ones would you find in the grass hopper’s legs?
Question 2 figure 1
  • A
    A and C
  • B
    B only
    Correct
  • C
    A only
  • D
    B and C
3
A plant that has well differentiated body, special tissues for transport of water and other substances, but does not have seed or fruits is a(n):
  • A
    Angiosperm
  • B
    Pteridophyte
    Correct
  • C
    Gymnosperm
  • D
    Bryophyte
4
Raju was suffering from severe stomach pain and the doctor diagnosed that he was suffering from peptic ulcers and treated him with antibiotics. He was relieved of pain. What could be the reason for peptic ulcers?
  • A
    Excess secretion of enzyme
  • B
    Reduced secretion of hormones
  • C
    Reduced water content
  • D
    Growth of Helicobacter pylori
    Correct
5
The average temperature of the Earth remains fairly steady as compared to that of the moon because of the
  • A
    Atmosphere
    Correct
  • B
    Lithosphere
  • C
    Hydrosphere
  • D
    Biosphere
6
In flowers, which one of the following conditions will increase chances of self-pollination?
  • A
    Stamens are just above the stigma of a pistil in a flower
    Correct
  • B
    Pistil is longer than stamens in a flower
  • C
    In all flowers of the plant only stamens are present
  • D
    In all flowers of the plant only pistil is present
7
Photosynthesis in an aquatic plant was measured by counting the number of bubbles coming out of the cut end of the plant. What will happen to production if you use a pipe blow air from your mouth into water in the beaker?
Question 7 figure 1
  • A
    Bacteria from mouth will infect plant. Hence reduction in \({O_2}\)production
  • B
    Water is already in contact with air. Hence air from mouth will have no effect
  • C
    Air from mouth contains \(C{O_2}\)which is utilized in photosynthesis. Hence increase in \({O_2}\)production
    Correct
  • D
    Air from mouth contains \({O_2}\)which is being added to the plant. Hence increase in \({O_2}\) production
8
A person with blood group ‘A’ can donate blood to the persons with blood group ‘A’ or ‘AB’ because it
  • A
    has only ‘B’ antigen and ‘A’ antibodies
  • B
    has both ‘A’ and ‘B’ antigens
  • C
    has only ‘A’ antigen and ‘B’ antibodies
    Correct
  • D
    does not have any antigens and antibodies
9
What would happen to the person if cerebellum of his brain is damaged?
  • A
    He will not be able to swallow food properly
  • B
    He will be unable to coordinate and stand properly
    Correct
  • C
    He will lose his powers of vision and hearing
  • D
    He will lose his memory power
10
Which of the following statements are correct? A. Tapeworms are hermaphrodites and undergo self-fertilization. B. Earthworms are hermaphrodites and undergo self-fertilization. C. Tapeworms are hermaphrodites but undergo cross-fertilization. D. Earthworms are hermaphrodites but undergo cross-fertilization
  • A
    C and D
  • B
    B and C
  • C
    D and A
    Correct
  • D
    A and B
11
A group of red beetles lives on green leaves of a tree. Beetles multiply through sexual reproduction. One day, some green beetles are seen among the red beetles. Green beetles breed to produce green progeny. Crows on the tree eat beetles. Some green beetles appear among the red beetle because
  • A
    red beetles mimic green colour of leaves whenever they see crows
  • B
    beetles change colour from red to green with change of season
  • C
    beetles become green by accumulating chlorophyll from the green leaves that they eat
  • D
    natural variations occur during sexual reproduction
    Correct
12
A group of red beetles lives on green leaves of a trees. Beetles multiply through sexual reproduction. One day, some green beetles are seen among the red beetles. Green beetles breed to produce green progeny. Crows on the tree eat beetles. The colour composition of beetle population is likely to change in the following manner:
  • A
    More red beetles survive than the green
  • B
    More green beetles survive than the red
    Correct
  • C
    Both red and green beetle survive equally
  • D
    Only the red beetle survives.
13
If the heart rate of a man is less than 60 per minute then it is called as
  • A
    Ischemia
  • B
    Bradycardia
    Correct
  • C
    Bradykinin
  • D
    Tachycardia
14
Non-degradable and fat soluble pollutant, such as DDT enters the food chain, the pollutant
  • A
    degrades at first trophic level
  • B
    accumulates in the body fat of organism at first trophic level and does not pass to second trophic level
  • C
    decreases in concentration at each trophic level
  • D
    magnifies in concentration at each trophic level
    Correct
15
Which of the following is known as energy currency of cell?
  • A
    Pyruvate
  • B
    Adenosine diphosphate
  • C
    Adenosine triphosphate
    Correct
  • D
    Glucose