Un-branched polymers built from the same set of 20 amino acids is a _____________.
Fill in the blank(s) with the appropriate word(s).
Answer: Polypeptide
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With respect to RNA processing, which of the following is false?
A) It leads to the production of alternative gene products. B) Some introns are removed by spliceosomes. C) Some introns are self-splicing. D) Prokaryotic mRNAs are polyadenylated at the 3' end. E) Chemical modification occurs with tRNA transcripts.
The microbiologist identified an organism that produces large c-hemolytic colonies on blood agar and appears as a gram-variable rod on Gram staining. In order to further identify the organ-ism, the microbiologist should:
a. no further identification is necessary. b. complete a biochemical panel and antibi-otic sensitivity. c. complete a biochemical panel, no antibi-otic sensitivity is warranted. d. report the organism as Bacillus spp.
Humans are classified as hominoids because
A) they have larger bodies and bigger brains than other primates. B) all primates are classified in this group. C) they have hair during some part of their lives. D) at one point in their evolutionary history, they possessed a tail. E) aerobic metabolism uses hemoglobin for oxygen transport.
Spontaneous mutations, which will be passed to offspring, can occur in the cell's
A. DNA. B. mRNA. C. tRNA. D. All of these answers are true.