举一反三
- 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
- Which of the following methods is not used by cells to regulate the amount of a protein in the cell A: Genes can be transcribed into mRNA with different efficiencies. B: Many ribosomes can bind to a single mRNA molecule. C: Proteins can be tagged with ubiquitin, marking them for degradation. D: Nuclear pore complexes can regulate the speed at which newly synthesized proteins are exported from the nucleus into the cytoplasm.
- A newly synthesized RNA molecule is called a _______________.
- A β sheet is made when ______________ form between segments of a polypeptide chain that lie side by side.
- What is meant by veering the anchor chain? ___ . A: Bring the anchor to short stay. B: Heaving in all the chain. C: Locking the windlass to prevent more chain from running out. D: Paying out more chain.
内容
- 0
An α helix is generated when a single polypeptide chain turns around itself to form a structurally rigid _______.
- 1
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.
- 2
1.There is a close connection between the design and management of supply chain flows and the success of a supply chain.
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The push/pull view of the supply chain is useful when considering strategic decisions relating to supply chain design, because it specifies the roles and responsibilities of each member of the supply chain.
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Which part of translation involves the addition of amino acids to an existing polypeptide chain? A: initiation B: elongation C: termination D: transcription