Protein synthesis requires the use of mRNA, which
A) is made in the nucleolus.
B) must be made by the ribosomes.
C) is translated by the ribosomes into the amino acid sequences of proteins.
D) carries the message to the nucleus to synthesize new DNA during cell division.
Ans: C) is translated by the ribosomes into the amino acid sequences of proteins.
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Currently, two extant elephant species (X and Y) are placed in the genus Loxodonta, and a third species (Z) is placed in the genus Elephas. Thus, which statement should be true?
A. Species X and Y are not related to species Z. B. Species X and Y share a common ancestor that is still extant (in other words, not yet extinct). C. Species X and Y are the result of artificial selection from an ancestral species Z. D. Species X and Y share a greater number of homologies with each other than either does with species Z. E. Species X, Y, and Z share a common ancestor, but nothing more can be claimed than this.
Which of the following secretions is NOT a digestive enzyme?
a. bile b. pepsin c. trypsin d. lipase e. amylase
An altered gene ____
a. is a mutation b. is always harmful c. always changes the protein d. occurs only during meiosis e. only occurs during base-pairing substitutions
A display of an individual's chromosomes is known as a(n) ________
Fill in the blank(s) with correct word