Molecular Biology Questions
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what part of the DNA replication process would be directly and immediately affected if a strain of bacteria lacking primase were used to make the cell extracts? (a) Initiation of DNA sysnthesis(b) Okazaki fragment synthesis(c) leading-strand elongation(d) lagging-strand completion
Which enzyme is NOT directly involved in DNA duplication? DNA ligaseRNA polymerase HelicaseAminoacyl synthetase
Telomeres serve as caps at the ends of linear chromosomes. Which of the following is NOT true regarding the replication of telomeric sequences(a) The lagging strand telomeres are not completely replicated by DNA polymerase(b) Telomeres are made of repeating sequences(c) Additional repeated sequences are added to the template strand (d) The leading strand doubles back on itself to form a primer for the lagging strand
Protein that catalyzes a specific chemical reaction is called a/an?
Common structural motif in proteins in which different sections of the polypeptide chain run alongside each other and are joined together by hydrogen bonding between atoms of the polypeptide backbone is called a/an
The lone pair electrons on oxygen are commonly used as what to give proteins secondary structure.
The inactivation of one X chromosome is established by the directed spreading of heterochromatin. The silent state of this chromosome is _______________ in the subsequent cell divisions.
What assumption is at the center of the derivation of the Michaelis-Menton kinetics?
Which of the following best describes the mechanism by which chromatin-remodeling complexes "loosen" the DNA wrapped around the core histones?
The units of a zeroth order reaction are?
Nucleosomes are formed when DNA wraps _____ times around the histone octamer in a ______ coil.
In the reaction 2 Na + Cl2 -> 2 Na+ + 2 Cl-, what is being reduced?
What is the correct scale for the volume of brewer's yeast?
Regular local folding patters in a protein, including alpha helix and beta sheets are called ?
A region on the surface of a protein that can interact with another molecule through noncovalent bonding is called a/an
Mitotic chromosomes are _____ times more compact than a DNA molecule in its extended form.
Proteins that change their conformation (and often their activity) when they bind a regulatory molecule or when they are covalently modified are called
Common folding pattern in proteins in which a linear sequence of amino acids folds into a right-handed coil stabilized by internal hydrogen bonding between backbone atoms is called a/an
The tendency for an amino acid side-chain group to become charged is the same for the amino acid in solution as for an amino acid in a protein.
Methylation and acetylation are common changes made to histone H3, and the specific combination of these changes is sometimes referred to as the "histone code." Which of the following patterns will probably lead to gene silencing?