The hemocyanin of arthropods and molluscs differs from the hemoglobin of mammals in that _____
A) the oxygen dissociation curve for hemocyanin is linear
B) hemocyanin carries appreciably more carbon dioxide
C) hemocyanin has protein coupled to copper rather than to iron
D) the protein of hemocyanin is not bound to metal
E) hemocyanin includes cyanic acid
Answer: C
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Which structure produces a sugar- and protein-rich fluid that provides energy for sperm motility?
A. epididymis B. seminal vesicle C. testis D. vas deferens E. prostate gland
Following fertilization, an ovary will develop into ____________, whereas an ovule will become ______________
a. a. a fruit; a seed b. an embryo; a fruit c. a seed; an embryo d. a female gametophyte; a seed e. a fruit; a female gametophyte
During replication, separation of DNA strands requires
a. hydrolysis and synthesis to occurs b. nucleotides to join together c. hydrogen bonds to unzip d. backbones to split
If only about 1% of the human genome is devoted to protein-encoded genes, what is the majority of the rest?
A. structural DNA B. repeated sequences C. duplicated sequences D. transposable elements E. introns