Drug resistance to anti-HIV drugs is a serious problem. Why does drug resistance appear so rapidly in HIV?
A) It has a high rate of mutation.
B) It's a virus.
C) It's found in the blood.
D) It's sexually transmitted.
A
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Beginning with the simplest level of structure, which order of organization of genetic material is CORRECT?
A. DNA, nucleotide, gene, genome, chromosome B. nucleotide, DNA, gene, chromosome, genome C. DNA, nucleotide, gene, chromosome, genome D. nucleotide, DNA, gene, genome, chromosome E. nucleotide, DNA, chromosome, gene, genome
A diploid (2n) hyphal cell of Neurospora crassa will take the next step in its life cycle by ________
a. breaking open to disperse spores b. undergoing meiosis to produce ascospores c. undergoing mitosis to produce more 2n hyphal cells d. finding a compatible strain and completing cytoplasmic fusion
Briefly explain the iron-sulfur world hypothesis and identify two pieces of evidence that support this hypothesis. What will be an ideal response?
The muscles of a recently deceased human can remain in a contracted state, termed rigor mortis, for several hours, due to the lack of _____
A) ATP needed to break actin-myosin bonds B) calcium ions needed to bind to troponin C) oxygen supplies needed for myoglobin D) sodium ions needed to fire action potentials