Acetylation adds a ____ group ____
a. CH3CO-; to the cytosine nucleotides of DNA
b. CH3CH2-; to the DNA of a promoter sequence
c. CH3CO-; to the histone protecting the transcription unit of a gene
d. CH3CO-; to the histone protecting the promoter region of a gene
e. CH3CH2-; to the RNA polymerase that will initiate transcription at the promoter region
ANSWER: d
You might also like to view...
Wilkins and Franklin studied the structure of DNA using ____
a. molecular scale models of nucleotides b. X-ray diffraction c. computer-assisted graphics d. electron microscopy e. light microscopy
Arsenic poisoning can lead to organ failure and death. Though arsenic can inhibit or interfere with a number of cellular enzymes, arsenic poisoning is thought to be mainly due to indirect inhibition of enzymes involved in both pyruvate oxidation and the Citric acid cycle. As a result, this compound must be able to enter which cellular compartment?
A. The intermembrane space of the mitochondria B. The cytoplasm C. The endoplasmic reticulum D. The nucleus E. The mitochondrial matrix
Which of the following are within the range of most radiation reaching the surface of Earth?
a. near-infrared and infrared radiation b. infrared radiation and microwaves c. ultraviolet and near-infrared radiation d. ultraviolet radiation and X-rays
The enzyme produced by the pancreas for the digestion of proteins is
What will be an ideal response?