Which biochemical unit encodes a single protein?
Answer: gene
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Transformed cells contain
a. transformants. b. new genes. c. bacteria. d. none of these choices.
Which type of cell functions to help control immune responses in the skin?
a. melanocytes b. Granstein cells c. keratinocytes d. Langerhans cells e. pigmented cells
Intracytoplasmic sperm injection is used by couples in which
A. the female has blocked oviducts. B. the female has very irregular ovulation. C. the female is approaching menopause. D. the source of sperm is a sperm bank. E. the male is infertile.
How do prokaryotic and eukaryotic chromosomes differ?
A) Eukaryotic chromosomes occur singly, and prokaryotic chromosomes occur as pairs. B) Genetic information is stored as DNA in eukaryotic cells and as proteins in prokaryotic cells. C) Prokaryotic chromosomes are not made from nucleotides. D) Prokaryotic chromosomes are not contained in a membrane-bound organelle.