BIO SEMESTER REVIEW (Part 3) Protein Syn. , Cell Cycle

What happens during the S phase of the cell cycle?

• DNA replicates (makes a copy)

• nucleus divides

• cell prepares for mitosis

Which part of the DNA structure provides the genetic code?

• deoxyribose sugar

• phosphate

• hydrogen bond

• Nitrogen bases

Meiosis makes sperm and egg cells. In humans, sperm and egg cells each have _____ chromosomes. Therefore a fertilized human egg cell (sperm and egg cell combined) would create a cell with _____ chromosomes.

• 23, 46
• 46, 23
• 2, 4
• 50, 100

The diagram shows the process of crossing over. Which claim about crossing over in chromosomes is best supported by the diagram?

• Crossing over increases genetic diversity through deletion.

• Crossing over decreases genetic diversity through mutation.

• Crossing over increases genetic diversity by creating new combinations of genes.

• Crossing over decreases genetic diversity by inserting nucleotides into gene sequences.

Which process creates new cells for growth and repair?

• mitosis

• meiosis

• megaladon

• mitochondria

Cancer is....

• uncontrolled cell division

• ATP inhibition

• cell growth inhibition

The sister chromatids of each chromosome are separated (come apart) and move to opposite ends of the cell. Name that Stage!

• Prophase

• Metaphase

• Anaphase

• Telophase

Phase of cell growth prior to cell division

• G0

• G1

• G2

• S

Events in the life of a cell that results in growth, duplication of DNA in order to produce new cells

• metaphase

• diploid

• cell cycle

• interphase

Carries out normal functions but does not divide; these cells remove themselves from the cell cycle

• G0

• G1

• S

• G2