A kinase is an enzyme that breaks a bond by inserting the elements of water tran
ID: 175765 • Letter: A
Question
A kinase is an enzyme that
breaks a bond by inserting the elements of water
transfer a phosphoryl group from ATP
removes a water molecule
transfers a phosphoryl group to a different position on a molecule
hydrolyzes phosphate esters
27.
which of the following does not participate in, nor is a component of, the electron-transport chain?
Lipoic acid
Non-heme, iron-sulfur proteins
FADH2
Cytochrome c1
30.
Then energy need of the cell are satisfied, acetyl-CoA accumulates and serves as a positive effector for
lactate dehydrogenase
pyruvate dehydrogenase complex
pyruvate carboxylase
fructose 1,6-bisphosphatase
succinyl-CoA synthetase
31.
Glycoform refers to:
a single protein type that can have forms that differ only in their glycosylation.
glycoproteins from the same gene family.
a common core of sugars that can be found on many different proteins.
All of the answers are correct
None of the answers is correct.
33.
Which amino acid chain would not be expected to participate in a "covalent" enzyme catalysis?
lys
cys
ser
leu
his
Features of the genetic code include
a codon is defined by three bases.
the code overlaps.
the code is degenerate.
a and c.
a and b.
37.
What are some of the features common to tRNA molecules?
Each is a single chain between 73 and 93 ribonucleotides.
They contain many unusual bases.
About half the nucleotides in tRNA are base-paired.
They usually have a pG at the 5 terminal.
All of the above.
breaks a bond by inserting the elements of water
transfer a phosphoryl group from ATP
removes a water molecule
transfers a phosphoryl group to a different position on a molecule
hydrolyzes phosphate esters
Explanation / Answer
Q. A kinase is an enzyme that?
ANS: D (transfers a phosphoryl group to a different position on a molecule).
Kinase is an enzyme that catalyzes the transfer of a phosphate group from ATP to another molecule.
Q. 27. ANS: A (Lipoic acid).
Lipoic acid participates in PDH reaction and Citric acid cycle of carbohydrate metabolism. It does not participate in electron-transport chain.
Q. 30. ANS: C (pyruvate carboxylase).
Pyruvate carboxylase is an enzyme that allosterically regulates acetyl CoA. If the concentration of acetyl CoA is excess then the pyruvate carboxylase can produced more oxaloacetate and enabling the cycle to utilize more acetyl CoA in the citrate synthase reaction.
Q. 31. ANS: D (All of the answers are correct).
Glycoform is a protein that present in different isoforms.
Glycoprotein contains same gene family and a common core of sugars that can be found on many different proteins. The number of sugar moieties that attached (saccharide or oligosaccharide) only differs in glycol proteins.
Q. 33. ANS: D (Leu).
In covalent bonds the substrate forms a temporary Schiff base and later it incorporates the base into the reaction. So these are good nucleophile, in the active sites.
Ex: Lysine (amino group)
Cysteine (thiol group)
Serine (presence of a hydroxyl group)
Histidine (imidazole group),
Q. Features of the genetic code include?
ANS: D (A and C).
The code is degenerate because some amino acids are coded by more than one codon.
Q. 37. ANS: A (All of the above).
Each is a single chain between 73 and 93 Ribo nucleotides.
They contain many unusual bases are present at 3’ end.
About half the nucleotides in t RNA are base-paired.
A phosphate group present at the 5 terminal end.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.