Wood and cotton cloth are composed of

a. cholesterol.
b. lipid.
c. cellulose.
d. glycogen.
e. chitin.


Ans: c. cellulose.

Biology & Microbiology

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The ________ is a highly conserved amino acid sequence found in immunoglobulin, TCR, and MHC proteins

A) heavy chain B) V domain C) C domain D) light chain

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Negative control means a regulator molecule is

A. bound and transcription starts. B. removed and transcription is inhibited. C. bound and transcription is inhibited. D. removed and transcription starts. E. bound and transcription is inhibited AND removed and transcription starts.

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The last case of naturally contracted smallpox occurred in

A. 1900. B. 1950. C. 1965. D. 1977. E. 1989.

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The biceps brachii is responsible for flexing the forearm while the triceps brachii extends the forearm. Muscles with such opposite actions are called

a. cooperative. b. antagonistic. c. involuntary. d. sensory.

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