See the provided genetic code table. A change in a single base pair could cause which missense mutation?
a. glutamic acid to threonine
b. glycine to proline
c. threonine to glutamine
d. glutamic acid to methionine
e. valine to methionine
ANSWER: e
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If sperm did not have a functional midpiece, how would they be affected?
a. They would not complete meiosis I. b. They would not complete meiosis II. c. They would die in the epididymus. d. They would not have a source of energy (ATP). e. They would not be able to digest the outer jelly coat layer of the oocyte.
The process by which food is propelled through the digestive tract by alternating contraction and relaxation of smooth muscle is
A) elimination. B) secretion. C) chemical digestion. D) peristalsis. E) absorption.
In which organ are T-lymphocytes finally matured?
A. Lymph nodes B. Bone marrow C. Spleen D. Thymus E. Tonsils
Agglutination tests make use of the fact that
A) antibodies have two antigen-binding sites and will cause clumping when bound to antigen. B) the presence of antibodies in a patient's serum will prevent viral infection of cells in culture. C) a reporter enzyme can be bound to an antibody to provide a visual change with a positive test. D) antibodies bound to antigen will precipitate in a gel matrix. E) T cells will release interferon-gamma during certain infections.