Multiple Choice QuestionsPGA as the first CO2 fixation product was discovered in photosynthesis of
bryophyte
gymnosperm
angiosperm
angiosperm
D.
angiosperm
The use of radioactive 14C by Melvin Calvin in algal (Chlorella) photosynthesis studies led to the discovery that the first CO2 fixation product was a 3- carbon organic acid. The first product identified was 3 -phoshoglyceric acid (PGA)
ABO blood groups in humans are controlled by the gene I, It has three alleles - IA, IB and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?
Three
one
Four
Four
Listed below are four respiratory capacities (1-4) and four jumbled respiratory volumes of normal human adult
|
|
Respiratory Capacities |
Respiratory volumes |
|
1 |
Residual volume |
2500 mL |
|
2 |
Vital capacity |
3500 mL |
|
3 |
Inspiratory reserve volume |
1200 mL |
|
4 |
Inspiratory capacity |
4500 mL |
|
Respiratory Capacities |
Respiratory volumes |
|
Residual volume |
2500 mL |
|
Vital capacity |
3500 mL |
|
Inspiratory reserve volume |
1200 mL |
|
Inspiratory capacity |
4500 mL |
(2)2500 mL, (3) 4500 mL
(3) 1200 mL, (4) 2500 mL
(4) 3500 mL, (1) 1200 mL
(4) 3500 mL, (1) 1200 mL
Select the correct statements out of the four (1-4) given below about lac operon.
Glucose or galactose may bind with the repressor and inactivate it
In the absence of lactose, the repressor binds with the operator region
The z- gene codes for permease
The z- gene codes for permease
Injury to the adrenal cortex is not likely to affect the secretion of which one of the following?
Aldosterone
Both androstenedione and dehydroepiandrosterone
Adrenalin
Adrenalin
Low Ca2+ in the body fluid may be the cause of
tetany
anaemia
angina pectoris
angina pectoris
Which one of the following pairs is incorrectly matched?
Glucagon - Beta cells (source)
Somatostatin - Delta cells (source)
Corpus luteum - Relaxin (secretion)
Corpus luteum - Relaxin (secretion)
Which one of the following statements in regard to the excretion by the human kidneys is correct?
Descending limb of Loop of Henle is impermeable to water
Distal convoluted tubule is incapable of reabsorbing HCO3
Nearly 99 percent of the glomerular filtrate is reabsorbed by the renal tubules
Nearly 99 percent of the glomerular filtrate is reabsorbed by the renal tubules
The nerve centres which control the body temperature and the urge for eating are contained in
hypothalamus
pons
cerebellum
cerebellum
If due to some injury the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?
The flow of blood into the aorta will be slowed down
The 'pacemaker' will stop working
The blood will tend to flow back into the left atrium
The blood will tend to flow back into the left atrium
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