Which of the following describes an organelle?
a. A membrane-bound sac within a cell
b. A structure made of tissues operating together
c. A group of similar cells carrying out the same function
d. An individual living entity
a. A membrane-bound sac within a cell
An organelle is a membrane-bound sac within
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Arrange the steps in translation in order from earliest to latest
A) movement of the ribosome three bases closer to the 3' end of the mRNA B) peptide bond formation C) identification of initiator codon and joining of large and small ribosomal subunits D) release of the polypeptide from the ribosome and dissociation of ribosomal subunits E) binding of a charged tRNA to a codon in the A site of ribosome
Haversian (central) canals are characteristic of which tissue?
a. adipose b. bone c. cartilage d. epithelial e. muscular
A cancer that develops in muscle is
a. malignant melanoma. b. oat cell carcinoma. c. giant cell carcinoma. d. rhabdomyosarcoma. e. Wilm's tumor.
Which one of the following is TRUE regarding metabolism?
A) Metabolism involves about 200 different chemical reactions occurring in a living organism. B) An anabolic reaction is one in which a large molecule is broken down into smaller molecules. C) Linear metabolic pathways occur when the product of one reaction is used as the substrate of the previous reaction. D) Catabolic pathways result in the release of energy. E) Anabolic reactions generate molecules with decreased energy content.