A combination of gametes that can be formed by the genotype AaBbCcDdEeFfGg are
A combination of gametes that can be formed by the genotype AaBbCcDdEeFfGg are
Select an option to attempt
Correct Answer: Option D
Explanation
Proline (Pro, P) is unique among the 20 standard amino acids: its side chain (a propyl group) forms a covalent bond with the backbone nitrogen, creating a rigid pyrrolidine ring. Consequences for-helix: (1) The backbone N-H is absent (N is tertiary, no H available) — proline cannot donate an H-bond in the helix, breaking the H-bonding pattern that stabilises-helices. (2) The pyrrolidine ring constrains the backboneangle to approximately(fixed), incompatible with ideal-helicalvalues (, but more importantly the rigidity means proline cannot adjust to the helix geometry). Result: proline introduces a rigid kink/bend, acting as a 'helix breaker.' It is commonly found at turns, hinges, and at the N-terminal first position of helices.