As helicase unwinds the DNA molecule, what keeps the strands apart?

A) DNA polymerase
B) Reverse transcriptase
C) Replication fork
D) Single-strand binding proteins
E) Okazaki fragments


D

Biology & Microbiology

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Which of the following is not one of the ways antibodies work?

What will be an ideal response?

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In the central nervous system, nerves are called

a. reflex arcs. b. nerve tracts. c. nerve pathways. d. neurofibers. e. monosynaptic paths.

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If you presented two substances–(1) LDL particles and (2) large aggregates of 'foreign' macromolecules–to a mixture of cells, which uptake mechanism would you expect the cells to use to ingest each substance? What distinguishes the uptake mechanisms?

What will be an ideal response?

Biology & Microbiology

One form of dwarfism, achondroplasia, is caused by a dominant allele (D). If two individuals with achondroplasia have children, there is a 1/4 chance one of their children will have the homozygous dominant genotype and will not survive the pregnancy. This fact tells you that this is a case of a _________ and the dwarf parents' genotypes must be both _________.

a) lethal recessive allele; dd b) lethal dominant allele; DD c) lethal dominant allele; Dd d) lethal recessive allele; Dd

Biology & Microbiology