Refer to the accompanying figure. The allantois is identified by number:a
1.
b. 2.
c. 3.
d. 4.
e. 5.
b
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Which of the following reactions is catalyzed by a ribozyme?
A. Last step in electron transport chain (reduction of O2 to form H2O). B. Attachment of amino acid to transfer RNA C. Peptide bond formation during protein synthesis D. First reaction in glycolysis (phosphorylation of glucose)
Four of the five answers listed below are characteristic of meiosis. Select the exception
a. involves two divisions b. reduces the number of chromosomes c. results in producing genetically identical cells d. produces haploid cells e. occurs in the gonads
Comparing cells synthesizing secretory proteins and cells secreting steroid hormones, the cells synthesizing the steroid hormones have
A) more rough ER. B) more smooth ER. C) equal amounts of smooth and rough ER. D) equal amounts of smooth and rough ER, but more lysosomes. E) equal amounts of smooth and rough ER, but fewer lysosomes.
Which region contains the largest amount of the global carbon pool?
A) fossil fuels B) aboveground terrestrial systems C) ocean D) atmosphere