The antibody-binding site of an antibody is made up of
A) portions of both of the heavy chains only.
B) the variable regions of the heavy chains.
C) the light chains only.
D) the variable regions of both light and heavy chains.
E) one heavy chain.
D
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Consider the following two chemical equations:A
glucose + fructose ? sucrose + H2O, ?G = +27kJ/mole (or +6.5 kcal/mole) B. glucose + fructose + ATP ? sucrose + ADP + Pi, ?G = ?5kJ/mole (or ?1.2 kcal/mole) The free energy change difference between the chemical equations (A) and (B) above is accomplishedby:a. a decrease in activation energy. b. combining two endergonic reactions. c. combining an endergonic and an exergonic reaction. d. combining two exergonic reactions. e. measuring the reaction rate.
The role of the CDR in a TCR is to
a. anchor the TCR in the cytoplasmic membrane. b. link the alpha and beta chains. c. bind the MHC–peptide complex. d. do all of the above.
A bacterial cell has replicated its plasmid, and when this cell divides into 2 daughter cells, each cell receives one copy of the plasmid. This is an example of horizontal gene transfer.
Answer the following statement true (T) or false (F)
How are amino acids different from one another?
a. The R-group, or side chain, is different in each amino acid. b. The central backbone of the amino acid molecule is different in each one. c. The amino group is different in each one. d. The carboxyl group is somewhat variable in each one.