Discuss how mutations in proteins can be used to examine the link between a person’s genotype and that person’s
phenotype. What will be an ideal response?
ANSWER: Mutations are heritable changes in a DNA sequence; they can occur in any cell of the body,
including those that give rise to sperm and eggs. Mutated genes can produce either an
abnormal, nonfunctional protein; a partially functional protein; or, in some cases, no protein
at all. Other mutations can affect the timing and level of gene expression, while some may
result in no phenotypic change and are essentially invisible. Mutations can also alter the
amino acid sequence of a protein. Changes in proteins produced by mutations, in turn,
produce changes in phenotype that range from insignificant to lethal.
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The ____ of a chemical reaction are transformed into different molecules called ____
Some help with this statement, please? Thanks.
You are a doctor who examines a swollen and warm puncture wound on the hand of a patient. Because the wound was made by a rusty nail, you are concerned about infection by Clostridium tetani bacteria, which cause tetanus
You are relieved to see that the patient received a tetanus vaccine at her last checkup. The vaccine ____________. A. exposed the patient to C. tetani so that she contracted a mild version of tetanus. B. exposed the patient to deactivated C. tetani, so that her B cells would produce antibodies to the bacteria with minimal risk of contracting the disease. C. stimulated the production of mast cells by her bone marrow. D. exposed the patient to other types of bacteria, so that her immune system would be prepared for infection by prokaryotes.
The diploid stage of the red algae life cycle is called:
a. sporophyte. b. zygote. c. gamete. d. gametophyte. e. haptophyte.
The immune response that targets one's own body tissues is known as a(n) ___________.
A. acute illness B. allergen C. autoimmune response D. cell-mediated immune response E. antibody-mediated immune response