LAST PUSH BEFORE THE BIG TEST 2023

Students created flowcharts to show select types of transport that occur across the plasma membrane.

Which flowchart correctly shows the types of plasma membrane transport?

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Deer mice consume autotrophs and other consumers to receive nutrients such as glucose to live. A group of students was interested in learning how energy is transferred between deer mice and other organisms in central Tennessee. The students created a food web of select organisms living with the deer mice in the same ecosystem. Their model food web is shown.

Which ecological pyramid best represents the approximate proportion of energy transferred from the grass to the bobcat?

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Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

If the leafhopper receives 463,000 kJ of energy, which value best represents the approximate energy lost between the trophic levels occupied by the gray rat snake and the Cooper’s hawk?

• 4,170 kJ

• 46.3 kJ

• 41,700 kJ

• 463 kJ

Tags

NGSS.HS-LS2-4

Which graph most accurately represents the change in the mass of the DNA in a body cell during one cell cycle?

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Tags

NGSS.HS-LS1-4

The graph shows the effect of temperature on the rate of an enzyme-catalyzed reaction in the presence of excess substrate.

If the reaction temperature were to increase from 40°C to 63°C, the reaction rate would likely..........

• decrease, because the enzyme would become denatured.

• increase, because the kinetic energy would increase.

• decrease, because the enzyme would be used up.

• stay the same, because the rate of enzyme-catalyzed reactions is constant.

Tags

NGSS.HS-PS1-5

A segment of DNA is shown.

Which strand is the complementary strand of DNA?

• 3’- TAA CGC TAA -5’

• 3’- AUU CGC AUU -5’

• 3’- ATT GCG ATT -5’

• 3’- AUU GCG AUU -5’

The rate of cell division varies greatly in different types of human cells. The data table shows the replacement rates of many types of human cells.

Which conclusion is most consistent with the data in the table?

• Cells in the integumentary system divide faster than any other type of cell in the body.

• Cells in the digestive system are among the most rapidly dividing cells in the body.

• Cells of the respiratory and circulatory systems have faster replacement rates than cells of the digestive system.

• Cells in the reproductive and nervous systems are never replaced.

Tags

NGSS.HS-LS1-4

In an investigation into the role of plants in the cycling of matter, a researcher is designing an experiment in which plants will be grown under conditions that will limit the rate of photosynthesis. Which design would match the goal of the researcher?

• Grow the plants in a low oxygen environment and measure the rate of carbon dioxide production.

• Grow the plants in a low carbon dioxide environment and measure the rate of oxygen production.

• Grow the plants in soil containing excess water and measure the rate of transpiration.

• Grow the plants in soil containing excess nitrogen and measure the rate of plant growth.

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-5

Dialysis bags can be used as models of cells to explore the movement of materials into and out of cells. Students set up an investigation with a dialysis bag containing a 2% iodine solution in a beaker containing a 9% starch solution as shown in the figure. Starch turns blue-black in the presence of iodine. The dialysis bag is permeable to water and iodine but not to starch.

Which two observations most accurately predict what will occur in the investigation? ​ ​ ​ ​ ​ ​ ​

• The solution in the dialysis bag will turn blue-black.

  AND

  The solution in the beaker will turn blue-black.

• The solution in the dialysis bag will turn blue-black.

  AND

  The concentration of starch in the dialysis bag will increase.

• The solution in the beaker will turn blue-black.

  AND

  The mass of the dialysis bag will increase.

• The solution in the beaker will turn blue-black.

  AND

  The mass of the dialysis bag will decrease.

A diagram of a cell in a solution is shown. The cell is not permeable to the salt.

Which response describes net movement across the cell membrane under these conditions?

• Salt will move out of the cell.

• Salt will move into the cell.

• Water will move out of the cell.

• Water will move into the cell.