How many different types of chemoreceptors can be found in the taste buds?
A. hundreds
B. thousands
C. 40-50
D. five
D
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Answer the question using the accompanying figure. Which image represents the position of the Earth during the
vernal (March) equinox?
a. a b. b c. c d. d e. A and C
Amino acids are linked by what kind of bonds to
form the primary structure of a protein? a. disulfide b. hydrogen c. ionic d. peptide e. none of these
In the bonding of nitrogenous bases
a. adenine is paired with cytosine. b. adenine is paired with guanine. c. cytosine is paired with thymine. d. guanine is paired with cytosine. e. cytosine is paired with uracil.
In an inducible operon, the ____ is the molecular switch that controls gene expression, while the ____ is the DNA region where RNA polymerase binds to begin transcription
a. repressor; inducer b. inducer; repressor c. operator; promoter d. promoter; operator e. lactose; promoter