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
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Which of the following is not one of the ways antibodies work?
What will be an ideal response?
In the central nervous system, nerves are called
a. reflex arcs. b. nerve tracts. c. nerve pathways. d. neurofibers. e. monosynaptic paths.
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?
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