A blood test cannot determine if a person is a carrier of Tay-Sachs disease because the mutant allele is undetectable
a. True
b. False
Indicate whether the statement is true or false
False
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Proto-cells are considered to have
a. been simple membrane-bound sacs. b. been able to capture energy. c. been able to engage in metabolism. d. been able to reproduce. e. all of these.
Which of the following statements concerning gene regulation in eukaryotes is FALSE?
a. The organization of tissues and organs is regulated mainly via transcription. b. Some eukaryotic genes are constitutive. c. Eukaryotic genes do not usually form operon-like clusters. d. "Housekeeping" enzymes are expressed at all times. e. Eukaryotic cells lack inducible genes.
The attenuated oral poliovirus vaccine (OVP) is no longer administered in the U.S.A. because it
A. is very toxic. B. does not provide good immunity. C. can occasionally cause poliomyelitis. D. can be spread to contacts. E. can be spread to contacts and can occasionally cause poliomyelitis.
__________ is (are) a simple sugar(s) (a monosaccharide).
A) Glucose B) Sucrose C) Ribose D) Chitin E) Glucose and ribose