Upon stimulation of skeletal muscles calcium is immediately made available for binding to troponin from
Options
(a) blood (b) lymph (c) sarcoplasmic reticulum (d) bone
Correct Answer:
sarcoplasmic reticulum
Explanation:
The sarcoplasmic reticulum […]
The fixation and reduction of CO₂ occur in presence of
Options
(a) ATP (b) ATP and NADPH (c) NADPH, chlorophyll and water (d) ATP, NADPH and light
Correct Answer:
ATP and NADPH
Explanation: […]
The enzymes ribulose biphosphate carboxylase-oxygenase and phosphoenol pyruvate carboxylase are activated by
Options
(a) Mg (b) Zn (c) Mo (d) Mn
Correct Answer:
Mg
Explanation:
No explanation available. Be the first to write […]
Lack of pulmonary surfactant produces
Options
(a) asthma (b) emphysema (c) cystic fibrosis (d) respiratory distress syndrome
Correct Answer:
emphysema
Explanation:
Emphysema causes lung damage. You have airways in your lungs called bronchioles, and […]
In the cell walls of the guard cells, cellulose microfibrils are oriented
Options
(a) radially (b) transversely (c) tangentially (d) obliquely
Correct Answer:
radially
Explanation:
The radial arrangement of cellulose microfibrils (radial micellation) in […]
In human percent of body weight of carbohydrates, lipids and proteins respectively is
Options
(a) 1, 15, 17 (b) 15, 17, 7 (c) 7, 17, 15 (d) 17, 15, 7
Correct Answer:
1, 15, […]
In the Kreb’s cycle the FAD electron transport system operates during the conversion of
Options
(a) succinyl CoA to succinic acid (b) alpha-ketoglutarate to succinyl CoA (c) succinic acid to fumaric acid (d) […]
Removal of hydrogen and CO₂ from a substrate is called
Options
(a) Decarboxylation (b) Oxidation (c) Oxidative decarboxylation (d) Reductive decarboxylation
Correct Answer:
Oxidative decarboxylation
Explanation:
No explanation available. Be the first to […]
In a grassland ecosystem, if the number of primary producers is approximately 6 million plants the number of top carnivore (in million) which may be supported by it may be
Options
(a) 3 […]
Natural selection favours the leaf butterfly because it shows:
Options
(a) country shading (b) batesian mimicry (c) mullerian mimicry (d) portective resemblance
Correct Answer:
batesian mimicry
Explanation:
In Batesian mimicry a scarce, palatable […]
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