The monomer of a nucleic acid is called a (nucleoside/nucleotide/base)
What will be an ideal response?
nucleotide
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How do archaeal and eukaryotic cell membranes differ?
a. Archaeal membrane phospholipids form covalent bonds with one another, but eukaryotic membrane phospholipids do not. b. Eukaryotic membrane phospholipids are not composed of fatty acids, but archaeal membrane phospholipids are. c. Archaeal phospholipids move freely throughout the bilayer, but eukaryotic membrane phospholipids are stationary. d. Archaeal, but not eukaryotic, membranes are described by the fluid mosaic model. e. Eukaryotic membranes are less fluid than archaeal membranes.
An animal has a two-chambered heart and blood flows in a single circuit. This animal is a ____
a. crocodile b. frog c. red-winged blackbird d. salmon e. bear
The resolving power of a good light microscope is
a. 0.2 mm. b. 0.2 ?m. c. 0.2 nm. d. 0.2 Å.
Select the FALSE statement about viruses.
A. When viruses are treated in a way that prevents them from entering host cells and reproducing, they are said to be dead. B. Viruses have impacted the evolution of all other cellular life-forms including bacteria, achaeans, and eukaryotes. C. Viruses are the most numerous microbes on Earth. D. Cellular life-forms most likely preceded the origin of viruses since viruses need host cells in which to develop and reproduce.