Transfer RNA differs from other types of RNA
because it
a. transfers genetic instructions from cell nucleus
to cytoplasm.
b. specifies the amino acid sequence of a particular
protein.
c. carries an amino acid at one end.
d. contains codons.
e. does none of these.
Answer: c
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Bacterial cells typically have ____ while eukaryotic cells have ____
a. a single circular chromosome; many linear chromosomes b. several circular chromosomes; many linear chromosomes c. one linear chromosome; many circular chromosomes d. two circular chromosomes; numerous circular chromosomes depending on the species e. numerous circular chromosomes depending on the species; many linear chromosomes
Oxytocin is produced in the ___ and causes
___.
a. anterior pituitary--milk to move into mammary glands b. posterior pituitary--childbirth muscle contractions c. hypothalamus--childbirth muscle contractions d. hypothalamus--the fight or flight response e. anterior pituitary--glucose uptake by cells of the pancreas
The amphibian heart consists of two atria and two ventricle(s)
____________________ Indicate whether the statement is true or false.
When food distends the stomach, the hormone ____ is produced, which stimulates the gastric glands
a. secretin b. gastrin c. cholecystokinin d. gastric inhibitory peptide e. lipoprotein lipase