The three-dimensional structure of macromolecules is formed and maintained primarily through noncovalent interactions. Which one of the following is not considered a noncovalent interaction?
A) carbon-carbon bonds
B) hydrogen bonds
C) hydrophobic interactions
D) ionic interactions
E) van der Waals interactions
Answer: A) carbon-carbon bonds
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Toxigenicity in Corynebacterium diphtheriae is due to phage conversion
Indicate whether the statement is true or false.
During the termination stage
a. a STOP codon enters the ribosome. b. release factors bind the ribosome. c. mRNA detaches from the ribosome and the polypeptide chain. d. ribosomal subunits separate. e. all of these occur
Found in secretions such as breast milk and saliva.
What will be an ideal response?
A covalent bond occurs when
a. protons are transferred from one atom to another. b. neutrons are shared between two atoms to form an isotope. c. electrons are shared between two atoms to complete their octets. d. the hydrogen of one water molecule is attracted to the oxygen of another water molecule. e. electrons are transferred from one atom to another.