Unit 4 AP Biology Review

How is negative feedback different from positive feedback?

• Negative feedback harms the body

• Negative feedback works to reverse a change in a system

• Negative feedback is rarer than positive

• Negative feedback is slower than positive feedback

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NGSS.HS-LS1-3

After metaphase what phase occurs next in mitosis?

• Prophase

• Prometaphase

• Anaphase

• Telophase

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NGSS.HS-LS1-4

How much DNA should a daughter cell at the end of cytokinesis have when compared to the original parent cell?

• Half the amount

• The exact same amount

• Double the amount

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NGSS.HS-LS1-4

What is the primary purpose of mitosis?

• Evenly divide the cytoplasm of the cell

• Creating an exact copy of a cell's genetic material

• Protect an organism from mutations

• Ensure genetic material is properly transferred to daughter cells

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NGSS.HS-LS1-4

Which phase of the cell cycle does the cell spend the greatest amount of time in?

• S phase

• Interphase

• M-phase

• Cytokinesis

Mutations in genes that regulate the cell cycle will most likely lead to what disease?

• Cancer

• Apoptosis

• Meiosis

• Diabetes

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NGSS.HS-LS3-2

How are cancerous cell different from healthy cells?

• The have a much shorter cell cycle

• They do not need nutrients to survive

• They are reliant upon density dependent inhibition

• They have twice as much genetic material

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NGSS.HS-LS1-4

NGSS.HS-LS3-2

Choose the term that correctly describes the relationship between these two sugar molecules:

• cis-trans isomers

• enantiomers

• structural isomers

• isotopes

Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

• The two strands of the double helix would separate.

• The pyrimidines would be separated from the deoxyribose sugars.

• All bases would be separated from the deoxyribose sugars.

• The phosphodiester linkages of the polynucleotide backbone would be broken.

The reactivity of an atom arises from

• the sum of the potential energies of all the electron shells.

• the potential energy of the valence shell.

• the average distance of the outermost electron shell from the nucleus.

• the existence of unpaired electrons in the valence shell.

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NGSS.HS-PS1-1

NGSS.HS-PS1-2