Retinoblastoma is caused by mutation in Rb gene, and its cell of origin is (A)_________. In normal cells, Rb protein inhibits E2F dependent transcription, thus inhibits entry of (B)____________.
a. (A) Cone, (B) S phase
b. (A) Cone, (B) G2 phase
c. (A) Rod, (B) S phase
d. (A) Rod, (B) G2 phase
Answer: a. (A) Cone, (B) S phase
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Which one of the following is NOT a component of each monomer used to make proteins?
A) a phosphorus atom, P B) an amino functional group, NH2 C) a side chain, R D) a carboxyl group, COOH
In eukaryotic cells organelles are suspended within _________.
a. golgi b. matrix c. chitin d. cytosol e. none of the above.
The transformation of humans from hunter-gatherer societies to agriculturally based ones occurred
approximately _____.
a. 14,000 years ago b. 11,000 years ago c. 7,000 years ago d. 1,500 years ago e. 200 years ago
The neurons that are located in the brain and spinal cord are ____
a. motor neurons b. sensory neurons c. integrator neurons d. interneurons e. glial cells