Which of the following is the cause of malaria?
A. Toxoplasma gondii
B. Plasmodium
C. Giardia
D. Leishmania
E. Trypanosoma
Ans: B. Plasmodium
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The term saltatory propagation refers to the:
A. involvement of ions such as sodium and potassium in production of the action potential. B. ability of an action potential to "jump" from one node of Ranvier to the next. C. tendency of an action potential to move in one direction. D. All of the answer options are correct.
Genetic studies of an animal show that eye color is controlled by an autosomal gene with the dominant
allele (R) for red eye color and the recessive allele (r) for yellow eye color. A second autosomal gene has the dominant allele (T) leading to paws with thumbs while the recessive allele (t) codes for paws without thumbs. The genetic cross RRTT ? rrtt creates offspring with genotype RrTt. One of those dihybrids is mated in a testcross (RrTt ? rrtt). If the two genes are completely linked (no recombination occurs between them), then the testcross should produce offspring with the phenotype ratio
a. 3 red-eyed with thumbs: 1 yellow-eyed without thumbs. b. 1 red-eyed with thumbs: 1 yellow-eyed with thumbs: 1 red-eyed without thumbs: 1 yellow-eyed without thumbs. c. 1 red-eyed with thumbs: 1 yellow-eyed without thumbs. d. 9 red-eyed with thumbs: 3 yellow-eyed with thumbs: 3 red-eyed without thumbs: 1 yellow-eyed without thumbs. e. 1 yellow-eyed with thumbs: 1 red-eyed without thumbs.
Which organelle functions to break down and recycle large molecules?
A) Ribosome B) Golgi apparatus C) Lysosome D) Chloroplast
Which step in this process requires use of restriction enzymes?
A) step A B) step B C) step C D) step D