BIOLOGY Questions And Answers.


1.If DNA strand is GCTATGG mRNA strand synthesized from it would be:
A. CGAUACC
B. CGTATGC
C. CGATACC
D. CGUTCC

2.Tissue rejection is executed by:
A. Both B and T lymphocytes
B. Monocytes
C. B-lymphocytes
D. T-lymphocytes

3.Which of the following statement best describes the function of sinoatrial node?
A. It sends out electrical impulses to ventricles to contract.
B. It is present at upper end of the left atrium
C. It consists of small number of diffusely oriented cardiac fibers.
D. It sends out electrical impulses to atrial muscles causing both atria to contract.

4.A central cavity of the kidney where urine is collected after filtration is known as:
A. Ureter
B. Pelvis
C. Urethra
D. Urinary Bladder

5.Aldosterone plays role in:
A. Transport of water
B. Transport of K+ ions into kidney
C. Uptake of sodium in loop of Henle
D. Reabsorption of water

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