Biology Mid Year Review 1.2

Front

How many chromosomes does cell Y contain if the original cell X contains N number of chromosomes?

Back

2N

Front

Which step occurs during mitosis and maintains the chromosome number of an organism?

Back

Duplicated chromosomes are split into two identical cells

Front

An error at which checkpoint in the cell cycle would most likely lead to uncontrolled cell division and cancer? Options: the checkpoint that prevents cells from leaving M phase until they are ready, the checkpoint that prevents cells from leaving S phase until they are ready, the checkpoint that prevents cells from leaving G1 phase until they are ready, the checkpoint that prevents cells from leaving G2 phase until they are ready.

Back

the checkpoint that prevents cells from leaving M phase until they are ready

Front

What would most likely result if there were a mutation that decreased the function of the p53 gene?

Back

Abnormal cells would continue to divide.

Front

If a man with type BO blood has a child with a woman that has type AB blood, what is the percent probability that their child will have type AB blood?

Back

25%

Front

A student wants to view live organisms less than 1 millimeter in size, which are found in a sample collected from a stream. Which microscope would be best for the student to use while observing these living organisms?

Back

compound light microscope

Front

Why is the cell membrane described as selectively permeable?

Back

Some substances pass into the cell while others cannot.

Front

Why is the vacuole in a plant cell larger than a vacuole in an animal cell?

Back

The vacuole in the plant cell maintains turgor pressure.

Front

Where is ATP produced in cells?

Back

mitochondria

Front

Which part of the cell theory corresponds to Redi's findings?

• Half of the jars were covered, and half were left open. 
• Redi noticed that the meat in the sealed jars did not have maggots, but the meat in the open jars did have maggots. 
• Redi concluded that only flies could make more flies. 

Back

New cells arise from existing cells.