In transcription,
a. several RNA molecules are made from the same
DNA molecule.
b. a promoter sequence is needed.
c. DNA produces messenger RNA.
d. a specific enzyme called RNA polymerase is
required.
e. all of these occur.
Answer: e
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In the summer, temperatures in the native range for black widowbirds are exceedingly hot. To
cool themselves, the birds undergo a type of panting known as gular fluttering. This leads to evaporative water loss that cools the birds. This cooling is essential for __________.
a. meiosis b. adaptive radiation c. homeostasis d. heterotrophy
The small intestine releases the hormone secretin in response to acid.
Answer the following statement true (T) or false (F)
Which type of molecule contains -NH2 groups?
A) Lipids B) Carbohydrates C) Proteins D) Nucleic acids E)None of the above
Treponema pallidum is the organism that causes syphilis, a sexually transmitted disease. This organism moves around freely, making it well adapted to traveling within bodily fluids and being spread from host to host during intimate contact
It possesses a single chromosome and has relatively few genes. The overall shape of this single-celled organism is similar to a corkscrew, with many twists and turns along its length. Based on this information, Treponema is most likely what type of cell? A) A prokaryotic spirillum B) A prokaryotic bacillus C) A prokaryotic coccus D) A flagellated eukaryote E) A ciliated eukaryote