NC Biology Released Exam 2019

Which is a primary function of a vacuole in a cell?

• enzyme production

• protein synthesis

• storage

• reproduction

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What determines the function of a specialized cell?

• the type of RNA in the cell

• the number of ribosomes in the cell

• the number of chromosomes in the cell

• the active genes in the cell

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NGSS.HS-LS1-1

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This diagram shows a red blood cell in a beaker that contains a solution with a higher salt concentration than that inside the red blood cell. What will happen to the red blood cell in this environment?

• The size of the red blood cell will remain constant.

• The red blood cell will swell at first and then shrink.

• The red blood cell will swell from absorbing salt molecules.

• The red blood cell will shrink from losing water molecules.

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NGSS.HS-LS1-3

During which phase of the cell cycle does most cell growth occur?

• cytokinesis

• interphase

• prophase

• mitosis

This diagram represents a closed terrarium exposed to sunlight. What must happen for the carbon cycle to continue in this terrarium?

• All organisms must continue to exchange gases.

• The snails must double their production of carbon dioxide.

• The plant must produce carbon dioxide at a faster rate.

• The decomposers must begin to produce oxygen.

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In nature, which type of behavior causes animals to produce aggressive displays and sounds?

• imprinting

• territoriality

• conditioning

• habituation

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NGSS.HS-LS2-8

What will most likely occur if the population of the world continues to increase at predicted rates?

• There will be an increase in biodiversity as a result of improvements in technology.

• There will be more rapid depletion of natural resources.

• The human race will rapidly become extinct.

• All human diseases will be eliminated.

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What will most likely happen if a nonnative species is introduced into a stable ecosystem?

• The native species will change their diet, and the ecosystem will remain stable

• The native species will move to another area, and the ecosystem will remain stable.

• The native species will have to compete for resources with the nonnative species, and the ecosystem will become unbalanced.

• The native species will share their food with the introduced species, and the ecosystem will become unbalanced.

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NGSS.HS-LS2-1

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Why must DNA replication have to occur before a cell can divide by mitosis?

• to maintain the same number of chromosomes in the daughter cells as in the parent cell

• to cause one of the cells produced to have double the number of chromosomes as the parent cell

• to allow crossing over to occur in each of the cells produced

• to cause all of the cells produced to have half the number of chromosomes as the parent cell

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NGSS.HS-LS1-4

A section of DNA has these bases: TAG CAG TAC

Which mRNA sequence is produced from this DNA section?

• ATC GTC ATG

• AUC GUC AUG

• AUG CUG AUC

• UTC GTC UTG

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NGSS.HS-LS1-1