Biology Semester Review Pt 2

Is it important for a cell to have two full identical sets of DNA ready before entering mitosis?

• Yes, each daughter cell needs to have an identical set of DNA from the parent cell.

• Yes, daughter cell needs to have a different set of DNA from the parent cell.

• No, DNA is duplicated during mitosis so it only needs one set when mitosis starts.

• No, mitosis does not involve the DNA of the cell.

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Which mitotic phase is pictured?

• Prophase

• Metaphase

• Anaphase

• Telophase

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What is the purpose of anaphase?

• To prevent cells from duplicating too quickly.

• To condense the chromatin into chromosomes

• To separate the sister chromatids so that each cell has an equal amount of DNA.

• To separate the cytoplasm and divide the cell into two equal daughter cells.

What is the purpose of cytokinesis?

• To prevent cells from duplicating too quickly.

• To condense the chromatin into chromosomes

• To separate the sister chromatids so that each cell has an equal amount of DNA.

• To separate the cytoplasm and divide the cell into two equal daughter cells.

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Cells that contain 2 sets of chromosomes are called _________ (2n).

• diploid

• haploid

• triploid

• polyploid

Cells that contain only ONE set of chromosomes are called ________ (n).

• diploid

• polyploid

• triploid

• haploid

When cells go through the cell cycle they produce

• Two diploid (2n) cells from one diploid (2n) cell

• Two haploid (1n) cells from one diploid (2n) cell

• Two diploid (1n) cells from one tetraploid (4n) cell

• Two haploid (1n) cells from one haploid (1n) cell

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The fact that a strain of yeast with a certain defective gene can use the human version of the gene to repair itself is evidence that yeast and humans -

• depend on the same food supply

• share a genetic code

• both have eukaryotic cells

• have identical genomes

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Why is DNA important?

• it is very small and very complicated
• it's in everything
• it serves as the blueprint for traits of all living things
• because we eat it every day for energy

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What bonds the nitrogen bases in the center of the DNA strand?

• Covalent Bonds
• Ionic Bonds
• Hydrogen Bonds
• Metallic Bonds