At which phases of the cell cycle are seen that the number of chromosome per cell is equals to the number of DNA molecules per cell ?

#Question id: 945

#Unit 1. Molecules and their Interaction Relevant to Biology

A key precursor in the synthesis of aromatic amino acids (tryptophan, tyrosine and phenylalanine) is ________.

#Question id: 32248

#Unit 2. Cellular Organization

#Question id: 10297

#Unit 6. System Physiology – Plant

The following statements are related to pentose phosphate pathway.

a) The first and third steps are oxidations with large, negative standard free-energy changes and are essentially irreversible in the cell

b) NADPH rises and inhibits the first enzyme in the pentose phosphate pathway. As a result, more glucose 6-phosphate is available for glycolysis

c) All the enzymes of the reversible reaction of the pentose phosphate pathway are located in the cytosol

d) The NADPH is used for biosynthetic reactions such as lipid synthesis and nitrogen assimilation in the cytosol

which one of the following combination  of above statements is incorrect?

#Question id: 29013

#Unit 7. System Physiology – Animal

Which of the following is an active form of vitamin D ?

#Question id: 1842

#Unit 4. Cell Communication and Cell Signaling

What is the minimum percentage of children that need to be vaccinated successfully in order to achieve herd immunity to diphtheria?