Scientists have produced a new cancer fighting drug that disrupts the cell cycle. The drug works by preventing the cell from correctly synthesizing new genetic material. Select the phase of the cell cycle the drug affects.

• G1

• G2

• S

• mitosis

Cell division is regulated to prevent unnecessary replication and errors that can occur in the process.  When regulation fails, mutations and cancer can result. The G₁ checkpoint ensures that conditions are right for division.  Evaluate each of these factors. All BUT ONE of them are examined at the G₁ checkpoint.

Responses

• evaluation of growth signals

• nutrient availability

• DNA is free of mutations

• chromatids are attached to centromeres

Select the answer choice that represent the two stages of photosynthesis.

• calvin cycle & kreb cycle

• glycolysis & aerobic respiration

• Krebs cycle & calvin cycle

• light reactions and calvin cycle

Tags

NGSS.HS-LS1-5

• Claim: The elements needed to form the large molecules of starch are absorbed from the soil by the plant’s tubers.

• Claim: The elements in glucose interact with other glucose elements to form large molecules of starch.

• Claim: The elements needed to form the large molecules of starch are consumed by the plant. 

• Claim: The elements in glucose interact with other elements from the soil to form large molecules of starch.

Tags

NGSS.HS-LS1-6

In cell transport: Compare the functions of lipids and proteins

• found in the nucleus and stores genetic information

• found the cell membrane and used to allow the transport of molecules in and out of cell

• found throughout the cell and used as catalysts

• found throughout the cell and used for short and long-term energy storage

Which statement correctly describes glucose in cellular reactions?

• It is a reactant of cellular respiration and photosynthesis.

• 
  It is a reactant of cellular respiration and a product of photosynthesis

• It is a product of cellular respiration and a reactant of photosynthesis.

• It is a product of photosynthesis and cellular respiration.

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-5

Which statement is true about aerobic and anaerobic cellular respiration?

• 
  Anaerobic cellular respiration produces ATP, while aerobic cellular respiration does not produce any ATP.

• Aerobic cellular respiration produces ATP, while anaerobic cellular respiration does not produce any ATP.

• Both aerobic and anaerobic cellular respiration produce ATP in the absence of oxygen.

• Both aerobic and anaerobic cellular respiration produce ATP, which stores energy for the cell.

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-5

Which statement describes how cellular respiration and photosynthesis are interrelated?

• Oxygen is produced during cellular respiration and stored during photosynthesis.

• Glucose is produced during photosynthesis as food that is broken down during cellular respiration.

• Carbon dioxide and water released by photosynthesis are used in cellular respiration.

• Photosynthesis releases the energy that is stored during the process of cellular respiration.

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-5

Which statement best describes the total number of carbon atoms during cellular respiration in the bird

• 
  The total number of carbon atoms decreases because the carbon-containing molecules from the food are destroyed during digestion.

• The total number of carbon atoms increases because the carbon-containing molecules from the food are used to make smaller carbon dioxide molecules.

• The total number of carbon atoms decreases because the carbon from the carbon-containing food molecules changes into other types of atoms.

• The total number of carbon atoms stays the same because the carbon from the carbon-containing food molecules is used to make molecules such as carbon dioxide

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NGSS.HS-LS1-7

NGSS.HS-LS2-5

Cells in the human body are surrounded by a cell membrane. This membrane is made up of special lipid molecules called phospholipids. Phospholipids consist of a phosphate head and long hydrocarbon tails. Where do the elements in a phospholipid come from?

• They originate from the water consumed by humans.

• They originate from sugars that were produced by photosynthesis and consumed by humans.

• 
  They originate from the soil and are absorbed by plants which are then consumed by humans.

• They originate from the breaking down of other cells in the body as they grow older and are broken down. 

Tags

NGSS.HS-LS1-6