The two chains of nucleotides in a DNA molecule are held together by:
A) covalent bonds.
B) ionic bonds.
C) hydrogen bonds.
D) hydrophobic interactions.
E) peptide bonds.
Answer: C
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Creosote bush clusters have been shown to be descendant from single seeds that germinated
a. in mesic environments. b. 9,000 to 11,000 years ago. c. from asexual reproduction. d. from a drought intolerant genotype. e. after being ingested by herbivores and deposited in feces.
What does a producer need for performing photosynthesis, and what does photosynthesis produce?
What will be an ideal response?
A dish of cells is treated with centrinone, a centriole inhibitor. These cells would no longer be able to ________.
A. make ATP B. synthesize proteins C. divide D. conduct photosynthesis E. produce lysosomes
If you cut out a gene using the restriction enzymes EcoRI and BamHI, what enzyme(s) will you need to insert the gene into another chromosome?
A) EcoRI only B) BamHI only C) Both EcoRI and BamHI D) Neither of these enzymes