Following statements are regarding to cortical granule reaction.

A. To initiating the slow block to polyspermy the release of Ca2+ that occurs when the sperm enters the egg is critical for activating the egg’s metabolism and initiating development

B. Calcium ions release the inhibitors from maternally stored messages, allowing these mRNAs to be translated

C. Calcium ions are not release the inhibition of nuclear division, thereby allowing cleavage to occur.

D. Udx1, the enzyme responsible for the reduction of oxygen to crosslink the fertilization envelope, is also NADPH-dependent

E. The fertilization envelope is elevated from the cell membrane by glycosaminoglycans which provides support for the blastomeres during cleavage

Which of the following combinations are correct?

#Question id: 10285

#Unit 6. System Physiology – Plant

Some of the statements given shows the activity of PFK-1 and PFK-2, which of the following statements incorrectly shown these enzyme activity?

#Question id: 10286

#Unit 6. System Physiology – Plant

The enzyme aldolase, catalyzes a reversible aldol condensation, Fructose 1,6-bisphosphate is cleaved to yield two different triose phosphates, glyceraldehyde 3-phosphate, an aldose, and dihydroxyacetone phosphate, a ketose. There are two classes of aldolases such as;

A) Class I aldolases

B) Class II aldolases

i) Found in animals and plants

ii) Found in in fungi and bacteria

iii) formation of protonated Schiff base on enzyme and its active site contain lysine residue

iv) do not form the Schiff base intermediate and a zinc ion at the active site is coordinated with the carbonyl oxygen at C-2

In which of the following option is the given enzyme with its correct statements?

#Question id: 10287

#Unit 6. System Physiology – Plant

Glyceraldehyde 3-phosphate dehydrogenase avtive site contain

#Question id: 10288

#Unit 6. System Physiology – Plant

 If all the ATP are radiolabelled in the cytosol, then predict about radioactivity of each compound.

 a) All enzyme  of glycolysis will be radiolabelled except 2-phophoglycerate and phosphenol pyruvate

 b) 2-phophoglycerate and phosphenol pyruvate are radiolabelled only the next cycle of glycolysis after cytosolic ATP radiolabelling

 c) 1,3 bisphosphoglycerate will be radiolabelled at 1 and 3 both position

 d) 2-phosphoglycerate are not radiolabelled because its enzyme phosphoglycerate mutase active site contain histidine residue exchange phosphate group from 3-phosphoglycerate

 which prediction about radiolabelling is incorrect?

#Question id: 10289

#Unit 6. System Physiology – Plant

If C6 of glucose is radiolabelled, which carbon of Dihydroxyacetone phosphate and glyceraldehyde 3-phosphate  is radiolabelled?

#Question id: 10290

#Unit 6. System Physiology – Plant

In glycolysis, perform succesfully ten step reaction, the conversion of 1 molecules of glucose 6-phosphate to 2 molecules of Pyruvate. What is the net gain of overall reaction?