In DNA, complementary nitrogen bases are held together by
A. phosphodiester bonds.
B. hydrogen bonds.
C. peptide bonds.
D. hydrophobic bonds.
E. nitrogen bonds.
Answer: B
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If a single-celled freshwater organism such as a protistan is transferred to saltwater, which of the following is likely to
happen?
a. The cell will burst. b. The cell will shrink. c. Salt will be pumped out of the cell. d. Salt will be pumped into the cell. e. Enzymes will flow out of the cell.
Semiconservative DNA replication refers to the fact that _____
1.every A will be matched up with a T on the opposite strand 2.children inherit a mix of genes from both parents 3.the amount of A nucleotides always equals the amount of T nucleotides, and C nucleotides equal G nucleotides. 4.one strand of each parent DNA helix ends up in each new molecule
See diagram. How many protons does Carbon have?
a. 12.001 b. 6 c. 18.001 d. 12
Which lymphoid organ has sinuses filled with blood instead of lymph?
What will be an ideal response?