NEW Bio I 3Q Review P1

The chromatin coils more and more tightly around organizing proteins.

• supercoiled DNA

• DNA & Histones

• DNA double helix

• Chromatin

What are the phases of mitosis? Hint: It's in order.

• PMAT (Prophase, Metaphase, Anaphase, Telophase)

• CMAT (Cytokinesis, Metaphase, Anaphase, Telophase)

• MPAT (Metaphase, Prophase, Anaphase, Telophase)

• MTAP (Metaphase, Telophase, Anaphase, Prophase)

Match the following.

A. loose combination of DNA and proteins

B. group of proteins in your chromosomes

C. Half of a duplicated chromosome

D. pinched region of the chromosome that holds it together

E. the ends of chromosomes

• A. chromatin

  B. histones

  C. chromatid

  D. centromere

  E. telomere

• A. chromatin

  B. histones

  C. centromere

  D. chromatid

  E. telemere

• A. histones

  B. chromatin

  C. centromere

  D. telomere

  E. chromatid

• A. telomere

  B. centromere

  C. histones

  D. chromatin

  E. chromatid

What happens at prophase?

• DNA & proteins condense into tightly coiled chromosomes.

• Nuclear envelope breaks down and spindle fibers form

• centrioles begin to move to opposite poles

• The chromosomes align along the cell equator.

What forms in cytokinesis in plant cells to separate the cell?

• cell plate

• cleavage furrow

• vesicles

• plasma membrane

What happens in metaphase?

• Spindle fibers attach to each chromosome

• They align the chromosomes along the cell equator.

• DNA & proteins condense into tightly coiled chromosomes.

• The cell copies its DNA.

In animal cells, cytokinesis happens by forming what?

• cell plate

• cleavage furrow

• vesicles

• chromosomes

What is the purpose of telomeres? Choose the best answer.

• To prevent from chromosomes from attaching to each other

• To help not lose genes

• To make sure the cell is working

• To attach to the structure

How many DNA is needed to form a chromosome?

• 1

• 2

• 3

• 5

What happens at anaphase?

• Chromatids separate to opposite sides of the cell

• Spindle fibers begin to shorten

• Cytokinesis starts.

• Interphase begins.