05 Test Review DNA and Cell Cycle

The diagram represents the cell cycle. When cells leave the cell cycle, they exit during G1 phase and then enter G0 phase, a resting period. Most normal cells can leave G0 phase and re-enter the cell cycle at G1 phase before entering S phase. Cancer cells are different because they cannot enter G0 phase and are likely to do which of the following?

• Fail to complete S phase

• Repeat the cell cycle continuously causing uncontrolled cell division

• Mutate during G phase

• Die after completing mitosis

If a DNA molecule is 22% adenine in any organism, which percentage of cytosine will that DNA molecule contain?

• 22%

• 28%

• 44%

• 56%

If a DNA molecule is 22% adenine in any organism, which percentage of thymine will that DNA molecule contain?

• 22%

• 28%

• 44%

• 56%

What is the complementary base to cytosine in DNA?

• uracil

• thymine

• guanine

• adenine

What is the complementary base to thymine in DNA?

• uracil

• thymine

• guanine

• adenine

Which stage of mitosis comes directly before Cytokinesis?

• Telophase

• Metaphase

• Interphase

• Anaphase

The uncontrolled division of certain body cells, which then invade the surrounding tissue and interfere with the normal functioning of the body is known as ______.

• Mitosis

• Cancer

• Meiosis

• Cytokinesis

The backbone of a DNA molecule is made of which two components?

• phosphate and ribose sugar

• deoxyphosphate and ribose sugar

• phosphate and deoxyribose sugar

• deoxyphosphate and deoxyribose sugar

In which phase does DNA replication occur?

• M

• G₁

• S

• G₂

During DNA replication, a strand with the sequence AGCTTA is being copied. What would be the sequence of the complementary strand?

• TCGAAT

• UCGAAT

• TCGAUA

• AGCTTA