The β-sheet is one of the most common secondary structures observed in protein structures. which of the following statements is true for the sheets represented above? a. sheet 1 is a representation of a parallel sheet. b. sheet 2 is a representation of an antiparallel sheet. c. sheet 1 will have four hydrogen bonds holding the two strands together. d. sheet 2 will have three hydrogen bonds holding the two strands together. e. a, b, and c are correct.

e.a,b,c

Explanation:

β-sheet are of two types

1. Anti parallel: Strands run in one opposite direction.

2. Parallel : Strands run in one direction

We know that β-sheet are the secondary structure in the proteins.These are connected by hydrogen bonds.

Important point for β-sheet

1.Sheet 1 is a representation of a parallel sheet

2.Sheet 2 is a representation of an anti parallel sheet

3.Sheet 1 will have four hydrogen bonds holding the two strands together

4. Sheet 2 will have three hydrogen bonds holding the two strands together.

So the option e is correct.

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion

the correct answer is sex-linked recessive.

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