Cellular Metabolism AIRs

A scientist isolates a number of non-photosynthetic prokaryotes. Which structures would be found in these cells?

• cell walls

• chloroplasts

• Golgi

• Gogli

• Nucleus

Students in a biology class conduct an experiment to determine the effect of temperature on the rate of photosynthesis in a plant. They place an Elodea plant into a test tube filled with water. Then, the students place the test tube under a light and slowly increase the temperature of the water. They record their results and display them on a graph as shown.

Which statement is supported by the data in the graph?

• The rate of oxygen production is lowest in section M

• The rate of oxygen production is greatest in section M.

• The production of water molecules is greatest in section L.

• The number of carbon dioxide molecules in the beaker is greatest in section K.

Tags

NGSS.HS-LS1-5

Students in a biology class conduct an experiment to determine the effect of temperature on the rate of photosynthesis in a plant. They place an Elodea plant into a test tube filled with water. Then, the students place the test tube under a light and slowly increase the temperature of the water. They record their results and display them on a graph as shown.

Which statement explains the effect of temperature on the rate of photosynthesis?

• Oxygen molecules break down at temperatures above 25°C

• The rate of photosynthesis is unaffected by the temperature of the water.

• The number of chloroplasts in the cell decreases as temperature increases.

• Enzymes involved with plant photosynthesis are disrupted at temperatures above 25°C

Tags

NGSS.MS-LS1-6

Which type of macromolecule stores energy and provides thermal insulation for the body?

• lipids

• proteins

• nucleic acids

• carbohydrates

Tags

NGSS.MS-LS1-7

Circle the products of fermentation

Scientists study anaerobic fermentation in yeast cells incubated at different temperatures.

The amount of Carbon Dioxide (CO₂) detected at each temperature in two trials is shown in the table.

Identify the optimal temperature for fermentation.

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-4

The graph shows the relative enzymatic activity among four different enzymes.

Which enzyme would be the most efficient in an environment where the pH level can fluctuate between acidic and basic.

• A

• B

• C

• D

The graph shows the relative enzymatic activity among four different enzymes.

What would happen if enzyme A was placed in an environment with a pH of 9?

• Enzyme A would become more efficient.

• Enzyme A would slow or stop functioning.

• Enzyme A would be transformed back into RNA.

• Enzyme A would become the substrate for enzyme D.

Chemosynthesis is a cellular process used by organisms in the deep sea ecosystem in the absence of light. A chemical equation for chemosynthesis is shown in the image.

How is chemosynthesis different from photosynthesis?

• Chemosynthesis requires carbon dioxide

• Chemosynthesis is used by autotrophic organisms

• Chemosynthesis produces energy in the form of sugars

• Chemosynthesis harvest energy from other chemical compounds.

Students investigate how light intensity affects the rate of photosynthesis in aquatic plants. The students place a light at different distances from the plant and record the number of bubbles produced.

There set-up and data are shown in the picture.

What inference is supported by the data?

• The plant produces more oxygen as light intensity increases.

• The plant takes in more water when the light intensity decreases.

• The plant requires more energy for photosynthesis at lower light intensities.

• The plant needs less carbon dioxide for photosynthesis at higher light intensities.

Tags

NGSS.HS-LS1-5