20 MCQ's

1 During division in cellular reproduction, the DNA and cytoplasm of the parent cell is distributed to two
A. clones.
B. chromosomes.
C. daughter cells.
D. simplified cells.

2. Suppose you’re looking through a microscope and you see an exchange of chromo-some  segments between chromosome pair 7 and chromosome pair 15. This condition is an example of
A. translocation.
B. duplication.
C. inversion.
D. relocation.

3. A DNA molecule has a unique design that resembles a spiral staircase. Scientists call this design a
A. spiral purine.
B. double helix.
C. double nucleotide.
D. spiral structure.                          

4. During meiosis, the “shuffling” exchange of genetic material is called
A. synapsis.
B. crossing-over.
C. tetrad formation.
D. allele distribution.

1. The scientific field devoted to developing new drugs for treating genetic disorders is
A. bioinformatics.
B. proteomics.
C. genetic profiling.
D. genomics.

2. Animal cells actively replicate their genetic material during
A. interphase.
B. the mitotic stage.
C. metaphase.
D. cytokinesis.

3. Proteins are synthesized in
A. messenger RNA.
B. the cell nucleus.
C. transfer RNA.
D. ribosomes.

4. What cell parts have been compared to the protective caps on the ends of shoe laces?
A. Oncogenes
B. BRCA1
C. Angiogenes
D. Telomeres

1. The human chromosomes that are responsible for the gender of a child are the
A. homologues.
B. autosomes.
C. X and Y chromosomes.
D. alleles.

2. A visual display of the chromosomes of a person, arranged by size, shape, and patterns of banding is called
A. a karyotype.
B. a genetic profile.
C. a gene map.
D. bioinformatics.

3. In the development of a cancer cell, the formation of new blood vessels is called
A. metastasis.
B. angiogenesis.
C. carcinogenesis.
D. differentiation.

4. Transgenic bacteria can be used to produce
A. food.
B. proteins.
C. medicines.
D. antibodies.

1. Let T mean tall and t mean short. If Clara’s mother is Tt and her father is it, what is the chance that she’ll be tall?
A. 1 in 4
B. 2 in 4
C. 3 in 4
D. Zero

2. Which statement about Chargaff’s rules is correct?
A. In each species, the amount of adenine equals the amount of guanine.
B. In each species, the amount of adenine equals the amount of thymine.
C. In each species, the amount of adenine equals the amount of cytosine.
D. The amount of adenine, guanine, thymine, and cytosine is the same in every species.

3. Once the _______ checkpoint is passed in the cell cycles, the cell is committed
to division.
A. M
B. G2
C. S
D. G1

4. A change in a single DNA nucleotide is called a
A. point mutation.
B. mutagen.
C. transposon.
D. ligase

1. In the human body, the _______ is a muscular membrane that separates the thoracic cavity from the abdominal cavity.
A. epiglottis
B. esophagus
C. diaphragm
D. bolus

2. In kidneys, the tiny tubules that produce urine are called
A. nephrons.
B. the ureters.
C. the renal cortex.
D. the renal medulla.

3. Which of these plant hormones hastens the ripening of fruit and helps to cause the fall of leaves, flowers, and fruit?
A. Cytokinins
B. Auxins
C. Ethylene
D. Gibberellins

4. In the central nervous system, the _______ communicates with and coordinates what happens in other parts of the brain.
A. cerebrum
B. cerebellum
C. brain stem
D. hypothalamus