What is the role of DNA in living things?
a. DNA stores the information required to make proteins.
b. DNA produces food for cells.
c. DNA produces energy for cells.
d. DNA directs the production of proteins.
Answer: a. DNA stores the information required to make proteins.
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Which of the following statements applies to sexually reproducing species but not asexually reproducing species?
A. Reproduction can occur with either one or two parents. B. The two "daughter" cells that result from cell division following mitosis are genetically identical to each other and to the original "parent" cell. C. Two kinds of cell division are required. D. Offspring are able to reproduce.
Extracellular fluid includes
a. interstitial fluid only. b. blood only. c. lymph only. d. blood and lymph only. e. interstitial fluid, blood, and lymph.
Refer to the following diagram of a generalized tetranucleotide to answer questions (a) through (e)
(a) Is this a DNA or an RNA molecule? ________ (b) Place an "X" (in one of the circles in the diagram) at the 3' end of this tetranucleotide. (c) Given that the DNA strand, which served as a template for the synthesis of this tetranucleotide, was composed of the bases 5' – A C A G – 3', fill in the parentheses (in the diagram) with the expected bases. (d) Suppose that one of the precursors for this tetranucleotide was a 32P-labeled guanine nucleoside triphosphate (the innermost phosphate containing the radioactive phosphorus). Circle the radioactive phosphorus atom as it exists in the tetranucleotide. (e) Given that spleen diesterase (breaks between the phosphate and the 5' carbon) digests the pictured tetranucleotide, which base(s) among the breakdown products would be expected to be attached to the 32P? Fill in the blank(s) with correct word
A human with two X chromosomes will normally develop as a __________
a. Male b. Female