DNA polymerase contains a lysine residue that is important for binding to DNA. Mutations were found that converted this lysine to either glutamate, glycine, valine, or arginine. Which mutations would be predicted to be the most and least harmful to the ability of the enzyme to bind DNA?

	Most	Least
(A)	Valine	Aspartate
(B)	Glycine	Arginine
(C)	Arginine	Glycine
(D)	Glutamate	Arginine

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#Question id: 24208

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the true substrate for hexokinase

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#Question id: 2894

#Unit 2. Cellular Organization

Which of the following statements is INCORRECT regarding the assembly of DNA into higher-order chromatin structure?

I. Histone H1 is not part of the histone octamer, but binds to linker DNA and is responsible for higher-order chromatin structure.

II. The 30 nm fibers of a chromosome are attached to a/an RNA-protein scaffold that holds the fibers in large loops.

III. It is not possible for linear DNA to be supercoiled. Only circular DNA, which has no ends, can have regions of supercoiling.

IV. Core histones lacking their amino-terminal tails are capable of forming 30-nm fibers as they help to stabilize the 30-nm fiber in internucleosomal interactions.

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#Question id: 26526

#Unit 3. Fundamental Processes

YSPTSPS repeats in CTD corresponds to the complexity of the genome. Which of the is correctly  representing the complexity(x-axis) vs no of repeat (y-axis)

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#Question id: 29428

#Unit 6. System Physiology – Plant

Thioredoxins occur in multiple forms and have conserved structures to interact with target enzymes , different types of thioredoxin in cells and their location is given

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#Question id: 6951

#Unit 5. Developmental Biology

In chick development, the cell movement during gastrulation is called: