Which DNA base pairing is incorrect?
a. A-T
b. A-U
c. G-C
d. C-G
e. T-A
ANSWER: b
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In addition to osmoregulation, the kidneys participate in regulating blood pressure. Specialized cells of the efferent arteriole, called the ____ apparatus, secrete the hormone renin in response to a drop in blood pressure
This, in turn, triggers additional responses that help raise blood pressure. Fill in the blank with the appropriate word.
What is the nutritional value in cereals, provided by seed plants, to humans?
a. proteins b. vitamins c. carbohydrates d. lipids
Ribosome inactivating proteins (RIPs) inhibit protein synthesis by preventing _____
a. mRNA from binding to the ribosome b. tRNA from binding to the ribosome c. the two halves of the ribosome from coming together d. the ribosome from moving forward from one codon to the next e. the newly synthesized amino acid chain from being released from the ribosome
One hypothesis explaining the first nucleated eukaryotic cell is based upon the fusion of an archaeon and a bacterium that, over time, saw archaeal genes involved in metabolism being lost while bacterial genes involved in information processing were also degraded.
Answer the following statement true (T) or false (F)