Mitosis/DNA Replication quiz

Structure (b) is a ......

• chromosome
• chromatid
• centromere
• centriole

Answer explanation

The 'mere is in the middle!

How many chromosomes does a human somatic cell have?

• 46
• 92
• 50
• 23

Answer explanation

Humans has 23 pairs of chromosomes (23 from mommy and 23 from daddy) - therefore 46 chromosomes in total.

Tags

NGSS.HS-LS3-1

The dark 'spider' looking things are called Spindle Fibers.  What is their job?

• To give the cell structure
• To pull the chromosomes apart
• To divide the cell
• To keep the cell organized

Answer explanation

Spindle fibers are proteins that pull the sister chromatids apart. Once apart the former sister chromatids are now called daughter chromosomes.

Tags

NGSS.HS-LS1-4

Which is Interphase?

• A
• C
• D
• F

Answer explanation

During interphase the DNA is in the form of chromatin (think spaghetti) and the chromosomes are NOT VISIBLE. Also the nucleus is still intact.

Which is Prophase?

• A
•  A & B

• B & F

• A & F 

Answer explanation

The answer is A & F because until the chromosomes are lined up in the middle it is still technically PROPHASE - preparing.

Tags

NGSS.HS-LS1-4

What is the name given to copies of a chromosome held together by a centromere

• sister chromatids
• genes
• centromere
• centriole

Answer explanation

Sister chromatids are IDENTICAL to each other. When they are pulled apart during anaphase they are then referred to as daughter chromosomes.

Tags

NGSS.HS-LS1-4

What is cancer?

• The heart does not receive enough blood.
• Sudden disruption of blood flow to part of the brain.
• Blood filled weak spot.
• Uncontrolled growth and spread of abnormal cells.

Answer explanation

Cancer is mitosis out of control.

Tags

NGSS.HS-LS3-2

True or false.  Cancer begins when mutations disrupt the normal cell cycle, causing cells to divide in an uncontrolled way.

• True
• False

Answer explanation

Yes, mutations cause the cell to 'blow through' the normal cell checkpoints - why, we are not completely sure.

Tags

NGSS.HS-LS1-4

NGSS.HS-LS3-2

Anaphase?

• 
• 
• 
• 

Tags

NGSS.HS-LS1-4

Telophase?

• 
• 
• 
• 

Tags

NGSS.HS-LS1-4