Starting with carbon dioxide in the air, put the following steps in order to trace the path of carbon through the slow carbon cycle:
What will be an ideal response?
1.Carbon is fixed by phytoplankton (photosynthetic marine organisms) through photosynthesis
2.Phytoplankton die and become fossilized
3.Fossil fuels are harvested
4.Carbon is released into the atmosphere through combustion
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Aminoglycoside antibiotics
A. inhibit folic acid biosynthesis. B. inhibit cell wall synthesis. C. bind to bacterial DNA polymerase. D. bind to the 30S ribosomal subunit.
process of translation can be broken down into three basic steps. Which of the following is NOT one of these?
A. initiation B. elongation C. translocation D. termination
The carbohydrate in DNA is
A) ribose. B) deoxyribose. C) glucose. D) phosphate. E) cellulose.
For each of the following sentences, choose one of the options enclosed in square brackets to make a correct statement about nucleosomes
A. Nucleosomes are present in [prokaryotic/eukaryotic] chromosomes, but not in [prokaryotic/eukaryotic] chromosomes. B. A nucleosome contains two molecules each of histones [H1 and H2A/H2A and H2B] as well as of histones H3 and H4. C. A nucleosome core particle contains a core of histone with DNA wrapped around it approximately [twice/three times/four times]. D. Nucleosomes are aided in their formation by the high proportion of [acidic/basic/polar] amino acids in histone proteins. E. Nucleosome formation compacts the DNA into approximately [one-third/one-hundredth/one-thousandth] of its original length.