A DNA molecule is considered antiparallel because the sugar-phosphate groups that are chained together to make each strand are oriented in opposite directions.
Answer the following statement true (T) or false (F)
True
It is true that DNA is considered antiparallel because the sugar-phosphate groups that are chained together to make each strand are oriented in opposite directions.
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Proteins known as chaperones are found only in Bacteria
Indicate whether the statement is true or false.
Where is the trp repressor gene located?
a. just upstream of the trp operon b. on a region of the chromosome distant from the trp operon c. adjacent to the lac repressor gene d. just downstream of the trp operon e. directly adjacent to the promoter region of the trp operon
Which immunoglobulin is able to pass across the
placenta to protect the fetus from pathogens? a. IgG b. IgA c. IgD d. IgM e. IgE
Earth's ozone layer is extremely important because it
A) traps harmful infrared rays. B) blocks incoming UV radiation, which is damaging to animals and reduces photosynthesis in plants and algae. C) blocks incoming visible light to protect Earth against the greenhouse effect. D) maintains high carbon dioxide concentrations so that photosynthesis can occur. E) traps heat so that Earth's temperature does not fall too much.