Which of the following statements is (are) true
concerning promoters?
a. They are short sequences in DNA.
b. They are locations in DNA where regulatory
proteins gather.
c. They control transcription.
d. They are associated with specific genes.
e. All of these are true.
Answer: e
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Which of the following events must occur to cause a chromosomal translocation?
A. One chromosome must break in two distinct locations. B. Two different chromosomes must break. C. A transposon must be present in one of the chromosomes. D. The broken ends must pair correctly. E. A mutation in the DNA must occur.
When division of the zygote reaches the eight-cell stage and the planes of cleavage of the upper four cells line up with those of the bottom four cells so that two tiers of cells result, one directly above the other, the type of cleavage is called:
A. direct cleavage B. spiral cleavage C. indirect cleavage D. protostome cleavage E. radial cleavage
Duplication can be advantageous for evolution. While the correctly functioning DNA segment remains intact, duplication provides new copies of genes that can be altered to new functions
Unfortunately, duplication can also result in human genetic disorders. Please provide an example of a human genetic disorder that occurs when certain DNA sequences are duplicated.
A child has a bicycle accident and is rushed to the ER. The doctors stop the bleeding, but the child needs a transfusion. Fortunately, the patient is AB-positive, so the doctors can give him ________
A) O negative only B) O positive only C) AB negative or positive only D) any blood type