The spatial conformation of a protein mainly depends on A: α-helix and β-sheet B: the sequence of amino acids in polypeptide chain C: disulfide bonds in polypeptide chain D: hydrophobic effects in polypeptide chain E: hydrogen bonds in polypeptide chain

Each polypeptide chain consists of a backbone that is adorned with a variety of chemical side chains. This polypeptide backbone is formed from a repeating sequence of the core atoms (_________) found in every amino acid.

Chaperone proteins can guide the __________ of a newly synthesized polypeptide chain.

A β sheet is made when ______________ form between segments of a polypeptide chain that lie side by side.

An α helix is generated when a single polypeptide chain turns around itself to form a structurally rigid _______.

During DNA replication, a short ___acts as the primer. A: DNA B: RNA C: polypeptide D: histone

For a typical protein length of 300 amino acids, more than ______ different polypeptide chains could theoretically be made

To begin DNA replication, a short ___ primer must first be produced.  A: DNA； B: RNA； C: polypeptide； D: histone

Which part of translation involves the addition of amino acids to an existing polypeptide chain? A: initiation B: elongation C: termination D: transcription

In the process of protein digestion and absorption, the following form with the highest absorption efficiency is A: Dipeptide B: Amino acids C: Polypeptide D: Intact protein