Let "A" be the allele for brown eyes and "a" the allele for blue eyes. A blue-eyed man marries a woman who is heterozygous for eye color. What is the expected chance their child will be homozygous recessive?
a) 100%
b) 75%
c) 25%
d) 50%
e) 0%
Answer: d) 50%
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Insects and other arthropods have a _____
1.Endoskeleton 2.Exoskeleton 3.Ectoskeleton 4.Hydrostatic skeleton 5.Proteinacious skeleton
For what purpose do bacteria use restriction enzymes?
A. They are used in plasmid exchanges to fuse plasmid DNA. B. They are used to restrict important nutrients from leaving the bacterial cell. C. They are used to resist infections by viruses. D. They are used to cut up and recycle mRNA transcripts. E. They are used to attach amino acids to tRNA molecules.
What is meant by the term cotransformation?
What will be an ideal response?
You are interested in Fuzzy, a soluble protein that functions within the ER lumen. Given that information, which of the following statements must be true?
(a) Fuzzy has a C-terminal signal sequence that binds to SRP. (b) Only one ribosome can be bound to the mRNA encoding Fuzzy during translation. (c) Fuzzy must contain a hydrophobic stop-transfer sequence. (d) Once the signal sequence from Fuzzy has been cleaved, the signal peptide will be ejected into the ER membrane and degraded.