What are telomeres?

a. “junk DNA” present throughout the length of our chromosomes
b. protein caps found on the ends of chromosomes
c. regions of DNA at the end of chromosomes which do not code for making proteins
d. DNA sequences which code for making proteins that regulate cell division


c. regions of DNA at the end of chromosomes which do not code for making proteins

Biology & Microbiology

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The evolution of many species from a single common ancestor is called

a. adaptive radiation b. punctuated equilibrium c. genetic drift d. disruptive selection e. microevolution

Biology & Microbiology

The four stages of food processing are, in order ________

A) ingestion, absorption, elimination, digestion B) ingestion, elimination, digestion, absorption C) ingestion, digestion, absorption, elimination D) digestion, absorption, ingestion, elimination

Biology & Microbiology

Some bacteria have an outer layer called a ________ which allows them to adhere to surfaces and contributes to their ability to cause disease

A) cell wall B) LPS C) capsule D) flagellum E) pilus

Biology & Microbiology

A PCR was designed to clone a DNA sequence of 1.5 kb. When the products were run on an agarose gel, there was a smear of bands ranging from 1.5 kb to 6 kb. Which of the following is a reason for this result?

A) the thermocycler malfunctioned B) one of the primers did not bind C) the polymerase overran the reverse primer D) the polymerase denatured

Biology & Microbiology