Which of the following is true of astrocytes? Select all correct choices
A. They are a specific type of glial cell.
B. They surround blood vessels in the brain.
C. They contribute to the blood-brain barrier.
A,B,C
Biology & Microbiology
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A virus in a lysogenic cycle is referred to as a ____
a. prophage b. virulent phage c. artificial phage d. T-even phage e. lytic phage
Biology & Microbiology
In DNA replication, what type of molecule is a
primer?
a. nucleic acid b. lipid c. protein d. carbohydrate e. inorganic
Biology & Microbiology
In the genetic code, when the first two nucleotides of a triplet are identical and the third letter is U or C, the codon always codes for the same amino acid
Indicate whether the statement is true or false
Biology & Microbiology
Sea stars eat:a
large fish. b. mostly algae. c. sea weed. d. mostly crustaceans and mollusks. e. debris on the bottom.
Biology & Microbiology