A typical body cell with 23 pairs of chromosomes is called a ________.
A. gamete
B. sister cell
C. somatic cell
D. haploid cell
C. somatic cell
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Endonucleases and exonucleases are enzymes that can remove nucleotides from a polynucleotide chain. An endonuclease removes nucleotides _______ while an exonuclease removes nucleotides _____________.
A. from the 5' end of the chain; from the 3' end of the chain B. from the 3' end of the chain; from the 5' end of the chain C. internally; from the ends of the chain D. from the ends of the chain; internally
An individual that has two dominant alleles for a trait (AA) is __________. Fill in the blank(s) with the appropriate word(s)
Most of the oxygen in the blood is transported by
a. plasma. b. megakaryocytes. c. platelets. d. hemoglobin. e. leukocytes.
Why does glucose appear in the urine of a diabetic?
A. The carriers for glucose reabsorption reach their maximum rate of transport. B. The ascending limb of the loop of Henle secretes glucose into the urine. C. No glucose is filtered into the glomerular filtrate. D. The volume of urine is too great to filter. E. The kidneys produce glucose in diabetes.