In order to provide a location to insert a vector within a strand of DNA, the DNA must first be cut by using which of the following?

a. plasmids
b. helicase
c. ligase
d. restriction enzymes


d. restriction enzymes

Biology & Microbiology

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A new species of tubeworm is discovered on a coral reef. The worm has a specialized ring of tentacles that acts as a sieve to capture small shrimp and plankton from the surrounding water. This worm would best be described as:

A. a suspension filter feeder. B. a suction feeder. C. an active predator. D. an herbivore. E. The feeding type of this worm cannot be determined from the information given.

Biology & Microbiology

Because of their structure, trans fats resemble ________ fatty acids in shape and are produced artificially during the manufacture of shortening and margarine.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Which statement best describes a DNA mutation?

a. DNA polymerase adds an incorrect base during replication. b. DNA is damaged by UV irradiation. c. A mistake in DNA sequence is repaired during replication. d. A permanent change occurs in the nucleotide sequence of DNA. e. Proofreading during replication replaces a mismatched nucleotide.

Biology & Microbiology

Which of the following answers lists the steps of aerobic cellular respiration in the correct sequence?

A. photosystem II - electron transport chain - photosystem I - carbon reactions B. glycolysis - electron transport chain - Krebs cycle - formation of acetyl CoA - chemiosmotic phosphorylation C. glycolysis - formation of acetyl CoA - Krebs cycle - electron transport chain - chemiosmotic phosphorylation D. chemiosmotic phosphorylation - formation of acetyl CoA - glycolysis - Krebs cycle - electron transport chain E. glycolysis - formation of acetyl CoA - chemiosmotic phosphorylation - Krebs cycle - electron transport chain

Biology & Microbiology