2014 biochem midterm Flashcards
what consequence is expected from an enzyme that shows multiple interacting substrate binding site?
a. hyperbola curve
b. Sigmoid co-operative
c. allosteric site active
b. Sigmoid co-operative
At what stage is DNA synthesized in a PCR reaction?
a- annealing
b- denaturation
c- extension
c- extension
what bonds are disrupted when you boil an egg? a- amide linkage b- peptide c- non-covalent bond d- s-s bonds
c- non-covalent bond
what causes a frameshift mutation? a-deletion b-translocation c-inversion d-duplication
a-deletion
What differentiates a prokaryotic gene from a eukaryotic in terms of gene structure?
Absence of introns
Which is a characteristic of chromatin remodeling
a- occurs in the nucleus
b- regulate gene transcription
c- important for DNA polymerase
b- regulate gene transcription
what is the percentage of non-relative DNA?
a. 40%
b. 45%
c. 50%
d. 55%
b. 45%
what is a characteristic of B-turn?
caused by proline residue
what is the primary sensor that recognizes incorrect protein folding?
a. glucosyltransferase
b. glucosidase I
c. glucosidase II
a. glucosyltransferase
what genetic change is universal in gene silencing?
a. Phosphorylation
b. DNA methylation
b. DNA methylation
in which nucleotide sequencing of the proximal DNA sequencing does methylation most commonly occur? a-AMP b-GMP c-CMP d-TMP
c-CMP
what is the major difference between normal proline and toxic proline?
a-Primary
b-Secondary
b-Secondary
what stimulates glycogen synthesis in muscle?
a-insulin
b-glucagon
a-insulin
What’s responsible for elongation?
a-A-site
b-P-site
c-E-site
a-A-site
What is the function of copper in collagen structure?
Cross-linking
