Zoology

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Q11. A right shift in the oxygen – haemoglobin dissociation curve is expected to occur when there is:
  • High pCO2
  • High pO2
  • Low pCO2
  • Less H+ concentration
Q12.
Assertion(A): Urea can be used to maintain osmolarity of body fluids.
Reason(R): Urea is more toxic and energetically less expensive than ammonia.

 

  • Both(A)and(R)are True and(R)is the correct explanation of(A).
  • Both(A)and(R)are True but(R)is not the correct explanation of(A).
  • (A)is True but(R)is False.
  • (A)is False and(R)is True.
Q13. Which hormone produced by the intestinal mucosa causes the secretion of enzymes from the pancreas and the contraction of gall bladder?
  • cholecystokinin
  • gastric inhibitory peptide
  • secretin
  • gastrin
Q14. To address the importance of bringing up socially conscious healthy families of desired size, all the following strategies will be helpful except
 
  • Educating people, especially fertile couples and those in marriageable age group, about available
    birth control options
  • Care of pregnant mothers, post-natal care of the mother and child, importance of breast feeding
  • Equal opportunities for the male and the female child
  • Allowing pre-natal sex determination so that couple can select the sex of the child
Q15. When a stimulus of adequate strength is applied at a site on the polarised membrane, the membrane at that site becomes:
  • freely permeable to Na+.
  • freely permeable to K+.
  • impermeable to Na+.
  • impermeable to K+.
Q16. Consider the two statements:
Statement I: Morphology refers to the form and structure of animals and plants, studied as a science.
Statement II: Anatomy is concerned with the identification and description of the body structures of living things. 
  • Statement I and Statement II are incorrect
  • Statement I is correct and Statement II is incorrect
  • Statement I and Statement II are correct
  • Statement I is incorrect and Statement II is correct
Q17. Match each item in Column I with one in Column II and select the correct match from the codes given:
Column I Column II
A PCR P E.coli plasmid
B ELISA Q DNA amplification
C Human insulin R Retrovirus
D Gene therapy S Antigen-antibody interaction
  • Q   S   R   P
  • Q   S   P   R
  • S   Q   P   R
  • S   Q   R   P
Q18. The structure formed during human embryonic development is shown in the given figure:
         
  • is morula and has 8 to 16 cells
  • is the antral follicle with a fluid-filled antrum
  • is blastocyst that gets implanted on the uterine endometrium
  • is gastrula where the three germ layers are formed before implantation
Q19.

Identify the types of cell junctions that help to stop the leakage of the substances across a tissue and facilitation of communication with neighbouring cells via rapid transfer of ions and molecules.

  • Adhering junctions and Tight junctions, respectively.
  • Adhering junctions and Gap junctions, respectively.
  • Gap junctions and Adhering junctions, respectively.
  • Tight junctions and Gap junctions, respectively.
Q20. What causes the first heart sound (lub) during a heartbeat?
  • Closure of the semilunar valves at the start of ventricular diastole
  • Opening of the semilunar valves to allow blood flow to the arteries
  • Rapid filling of the ventricles from the atria
  • Closure of the tricuspid and bicuspid valves during ventricular systole
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