Among prokaryotes, there are some that can live in every environment on earth.

a. true
b. false


Ans: a. true

Biology & Microbiology

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A thyroid disorder in which an excess of thyroid hormone is produced, causing anxiety, insomnia, heat intolerance,

weight loss, and tremors is known as ____. a. hypothyroidism b. goiters c. cretinism d. Graves' disease e. Hashimoto’s disease

Biology & Microbiology

An exonuclease is an enzyme that can

A. remove a terminal nucleotide in a polynucleotide chain. B. connect two fragments of DNA together. C. cut DNA at a site?specific sequence. D. catalyze DNA synthesis. E. produce an RNA primer for DNA synthesis.

Biology & Microbiology

Researchers have been able to study the pathway of a secreted protein by "tagging" it with a fluorescent marker. Using this method, you would observe fluorescence moving from the ER to which organelle?

A) Plasma membrane B) Lysosome C) Nuclear membrane D) Mitochondria E) Golgi apparatus

Biology & Microbiology

Which of the following is a sign of disease?

A) headache B) dizziness C) fever D) nausea E) cramps

Biology & Microbiology