The "charging" or activation of a tRNA molecule includes:
A. the covalent attachment of an amino acid to the 3'-terminal cytosine of the tRNA.
B. the covalent attachment of the amino group of an amino acid to the tRNA.
C. the covalent attachment of the carboxyl group of an amino acid to the tRNA.
D. the covalent attachment of an amino acid to the 5'-terminal adenosine of the tRNA.
C
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The average number of individuals of the same species per unit of surface area at a given time is the
a. population density b. population growth c. population birth rate d. population size e. carrying capacity
A transmembrane protein has 1000 amino acids. The fifth amino acid is found on the external surface of the cell membrane. It interacts with the aqueous environment outside the cell
Amino acids 25 and 205 are covalently bonded to each other and are required to give the protein its three-dimensional shape. Amino acid 554 is found on the outer surface of the protein, but it is deep in the interior of the membrane. Amino acid 979 is found on the external surface of the protein, where it forms a weak ionic bond with a chloride ion. Can you identify each of the numbered amino acids by structural group and name? Please note that there may be more than one specific amino acid possible in some cases. Amino acids: 5 25 205 554 979 What will be an ideal response?
What type of evidence for the theory of common descent would include the nonfunctional wings of an ostrich?
A) vestigial structures B) homologous structures C) shared developmental pathways D) DNA similarity
Why is Smallpox is a notable exception to the general replication scheme of DNA viruses?
a. It is a single-stranded DNA virus. b. It is a retrovirus c. It has prepackaged virally encoded enzymes and replicates in the cytoplasm d. It replicates only in the nucleus. e. None of the answers are correct