A cell performs its normal activities, grows in size, and makes copies of its organelles during _______.
a) prophase
b) anaphase
c) interphase
d) metaphase
e) telophase
Ans: c) interphase
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Which of these is NOT a step in transcription?
A) replication B) initiation C) termination D) elongation
Stress response elements (SREs) are _______ in certain plant genes that bind ________ and ________.
A: regulatory sequences; DNA methylases; enable epigenetic changes to the DNA at CpG islands. B: regulatory sequences; specific transcription factors; enable coordinated regulation of the expression of several genes. C: proteins; DNA; act like general transcription factors. D: silencers; repressor proteins; inactivate gene transcription . E: DNA sequences; inducers; cause inactivation of repressors.
What are male gametes called?:
a. ova b. sperm c. testes d. testosterone
Assume that you are told that a particular organism, Drosophila, has the XO chromosome complement. You are also told that the autosomal complement is a normal 2n. You know that in humans the XO complement is female determining. Would you be correct in
assuming that the Drosophila sex for XO is also female? Choose the answer that includes the correct explanation. A) Yes, the presence of an X chromosome determines a female in both organisms. B) Yes, because sex determination in humans and insects is essentially the same. C) No, the chromosomal basis for sex determination in Drosophila is based on the balance between the number of X chromosomes and haploid sets of autosomes. D) No, it takes two X chromosomes to produce a female in humans and a Y chromosome to produce a male in Drosophila. E) No, sex determination in Drosophila is dependent on the presence or absence of the Y chromosome.