An otherwise healthy student in BIL 150 is infected with Epstein-Barr virus (EBV), the double stranded DNA virus that causes infectious mononucleosis. The same student had already been infected when she was a child, and she had merely experienced a mild sore throat and swollen lymph nodes in her ne...
BIL 150 Gaines Test 3 – 100% SOLVED QUESTIONS
An otherwise healthy student in BIL 150 is infected with Epstein-Barr virus (EBV), the
double stranded DNA virus that causes infectious mononucleosis. The same student had
already been infected when she was a child, and she had merely experienced a mild sore
throat and swollen lymph nodes in her neck. This time, though infected, she does not get sick.
The EBV antigen fragments will be presented by the virus-infected cells along with which of
the following?
A. dendritic cells
B. antibodies
C. class I MHC molecules
D. class II MHC molecules
E. complement correct answers C. class I MHC molecules
Which of the following directing embryonic development can be found in the unfertilized
egg?
A. tissue-specific proteins
B. proteins in the organizer region
C. cytoplasmic determinants
D. mRNAs from embryonic genome
E. proteins in the dorsal lip of the blastopore correct answers C. cytoplasmic determinants
The extraordinary diversity of antibodies results in part from
A. The action of monoclonal antibodies
B. The splicing of protein molecules
C. The action of cytotoxic T cells
D. The rearrangement of genes
E. Their remarkable nonspecificity correct answers D. The rearrangement of genes
Which of the following secretes progesterone?
A. placenta
B. corpus luteum
C. follicle
D. Both A and B are correct
E. A, B and C correct answers E. A, B and C
The role of cytotoxic T cells is the secretion of _____, which plays a role in the _____
immune response.
A. antibodies ... antibody-mediated
B. perforin ... humoral
C. interleukin ... humoral
D. antibodies ... humoral
E. perforin ... cell-mediated correct answers E. perforin ... cell-mediated
, Suppose there was a mutation in the segment-polarity genes of Drosophila. What do you
suppose might be the outcome?
A. Legs will appear in the place of antennae.
B. Antennae will appear in a different part of their usual segment.
C. Several segments of the embryo will be missing.
D. Every other segment of the embryo will be missing.
E. Two heads would develop correct answers B. Antennae will appear in a different part of
their usual segment.
Which of the following is released into the oviduct during ovulation?
A. secondary oocyte
B. primary oocyte
C. mature ovum
D. oogonium
E. second polar body correct answers A. secondary oocyte
Which of the following is FALSE about helper T cells?
A. They are subject to infection by HIV.
B. They are activated in innate immunity.
C. They bear surface CD4 molecules.
D. They function in cell-mediated and humoral responses.
E. When activated, they secrete cytokines (interleukins). correct answers B. They are
activated in innate immunity.
If a cell has 4 chromosomes at metaphase of mitosis, how many chromosomes will it have
during anaphase?
A. 4
B. 8
C. 16
D. 32
E. 64 correct answers B. 8
Which statement best describes the difference in responses of effector B cells (plasma cells)
and cytotoxic T cells?
A. B cells secrete antibodies against a virus; cytotoxic T cells kill virus-infected cells.
B. B cells accomplish the cell-mediated response; cytotoxic T cells accomplish the humoral
response.
C. B cells confer active immunity; cytotoxic T cells confer passive immunity.
D. B cells kill viruses directly; cytotoxic T cells kill virus-infected cells.
E. B cells respond the first time the invader is present; cytotoxic T cells respond subsequent
times. correct answers A. B cells secrete antibodies against a virus; cytotoxic T cells kill
virus-infected cells.
Communication within and between cells during animal development can include all of the
following except ________.
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