Of all the different codons that exist, three of them ____
a. are involved in mutations
b. do not specify a particular amino acid
c. cannot be copied
d. determine amino acids, and in addition, also provide punctuation or instructions such as "stop"
e. do not specify a particular amino acid, but do provide punctuation or instructions such as "stop"
ANSWER: e
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T cells mature in the
A. bone marrow. B. thymus. C. Peyer's patches. D. nervous tissue.
Multiple sclerosis involves primarily ________
A) destruction of the medulla oblongata B) deterioration of the corpus callosum C) destruction of the myelin sheath D) deterioration of parts of the spinal cord
Most archaeal mRNAs like those of eukaryotes are spliced.
Answer the following statement true (T) or false (F)
Most hormones produced in the anterior
pituitary
a. affect kidney functioning. b. are secreted in response to signals from the medulla oblongata. c. control the release of hormones from other endocrine glands. d. are steroid hormones. e. have their effect in the posterior pituitary