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.

i do not know and i have a 100 in this class

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]