Which statement is not true about the rod cells?
a. Detect dim light
b. Least abundant photoreceptor.
c. Contain the pigment rhodopsin.
d. Respond to changes in light intensity.
e. Most abundant photoreceptor.
b
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The "adaptor" molecule that was hypothesized by Francis Crick to link amino acids to mRNA is actually which type of biomolecule?
A. protein B. DNA C. tRNA D. rRNA
Which nondisjunction disorder must be due to an event in sperm development?
A. XO B. XXX C. XXY D. XYY E. Trisomy 21
Why is ATP required for glycolysis?
a. ATP is used to convert PEP into pyruvic acid. b. ATP is used to convert DHAP into G3P. c. ATP is used to reduce NAD+ to NADH. d. ATP makes it easier to break apart glucose into two three-carbon molecules.
All of the following pertain to tapeworms, except the
A. cysticerci are young infective larvae ingested in undercooked meat. B. one proglottid segment will have either female or male reproductive organs. C. proglottids are reproductive segments. D. scolex is the attachment organ. E. strobila is made up of proglottids.