In the lac operon, cAMP binds to:
a. DNA.
b. the repressor gene.
c. the operator gene.
d. the repressor protein.
e. catabolite activator protein.
E
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Inhibitory postsynaptic potential (IPSP) is associated with membrane depolarization, whereas excitatory postsynaptic potential (EPSP) is associated with hyperpolarization
A. true B. false
Which of the following are the most advanced seedless vascular plants because of their large leaves and branching roots?
a. Ferns b. Horsetails c. Club mosses d. Hornworts
There are three alleles controlling the ABO blood
types. IA and IB are codominant genes so that the combination IAIB produces the AB blood type. The third allele, IO, is recessive to the other two alleles. Indicate which of these parents could produce the given child:Parents Child Yes or No (a) A x AB B (b) A x O A (c) A x B O (d) A x AB O (e) A x AB B (f) B x B O (g) AB x AB A What will be an ideal response?
Heinz Fraenkel-Conrat induced point mutations in the genes encoding coat proteins of TMV and looked for changes in the resulting proteins
By examining the effect of single-base changes in the mRNA on the amino acid sequence, Conrat proved that __________. A) the genetic code is overlapping B) the genetic code is nonoverlapping C) the genetic code is redundant D) there are 20 amino acids E) the genetic code is triplet