The currency of energy in cells is known as:
Answer: ATP
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The codon on the ________ matches with the anticodon on the ________ to direct the addition of the correct amino acid to the growing polypeptide chain
A) mRNA / tRNA B) tRNA / mRNA C) DNA / mRNA D) tRNA / rRNA
In plants, peroxisomes associated with nitrogen fixation in legumes can be found in great abundance in
A) leaves. B) stems. C) phloem and xylem. D) cotyledons. E) root nodules.
An inactivating mutation in the progesterone receptor gene would likely result in _____
A) the absence of secondary sex characteristics B) the inability of the uterus to support pregnancy C) enlarged and hyperactive uterine endometrium D) the absence of mammary gland development
Answer the following questions true (T) or false (F)
1. An antigen may consist of multiple epitopes, each of which recognized by different lymphocytes. 2. Allorecognition occurs when B and T cells are screened for self-tolerance. 3. Graft-versus-host disease occurs when transplanted bone marrow gives rise to B and T cells that attack the recipient's tissues.