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If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine, and Cytosine in it?
T=20%, G=20%, C=30%
T=30%, G=20%, C=20%
T=10%, G=30%, C=30%
T=30%, G=10%, C=30%
Guanine constitutes 15% of the nucleotides in a sample of DNA. What percentage of the nucleotides in this sample will be Adenine?
15%
25%
35%
20%
A double-stranded DNA molecule has 20% Cytosine. What is the percentage of Adenine in this DNA?
30%
20%
40%
10%
If a DNA molecule contains 22% Thymine, what is the percentage of Guanine?
22%
28%
30%
44%
In a bacterial cell's DNA, if Adenine makes up 18% of the bases, what percentage does Cytosine constitute?
18%
36%
42%
32%
Which of the following statements regarding histones is INCORRECT?
They are rich in basic amino acids like lysine and arginine.
They have a net positive charge at physiological pH.
Post-translational modifications of histones neutralize their positive charge.
They form the core of nucleosomes.
Histones are crucial for DNA packaging. Which of the following is NOT a characteristic of these proteins?
Rich in basic amino acids
Positively charged
Primarily composed of carbohydrates
Synthesized mainly during S phase
Which statement about the synthesis of histones is TRUE?
It is coupled with DNA synthesis.
It occurs primarily during the G1 phase of the cell cycle.
It takes place within the nucleus.
It happens continuously throughout the cell cycle.
The positive charge of histones is primarily due to the abundance of which amino acids?
Aspartic acid and Glutamic acid
Lysine and Arginine
Serine and Threonine
Valine and Leucine
Nowadays, it is possible to detect the mutated gene causing cancer by allowing a radioactive probe to hybridize its complementary DNA in a clone of cells, followed by detection using autoradiography because:
mutated DNA is amplified using PCR
mutated DNA is extracted from the cells
radioactive probes inhibit the growth of mutated cells
autoradiography can visualize the growth of mutated cells
