Which of the following conclusions can be drawn from this graph?

The optimum pH of the enzyme is 6.6.

The optimum pH of the enzyme is 5.8

The enzyme’s activity increases as pH increases 5.0 to 9.0

The enzyme’s activity is greater around pH of 8.0 .

Reference the chart below: If enzyme C is functioning at 25°C and a pH of 7, under which conditions would the rate of enzyme action probably increase ?

The temperature is increased to 30 °C and the pH is increased to 8

The temperature is decreased to 22 °C and the pH is kept the same

The temperature is increased to 44 °C and the pH is kept the same

The temperature is kept the same and the pH is decreased to 6.

What would happen if you placed alkaline phosphatase into an environment with a pH of 3?

alkaline phosphatase would slow or stop functioning

alkaline phosphatase would become more efficient

alkaline phosphatase would be transformed back into RNA

alkaline phosphatase would become the substrate for enzyme D

The diagram shows four different cells from the same animal. Which statement about the cells is accurate?

the four cells have identical DNA sequences

Cell 1 and Cell 2 have all of the same active genes even though they are from different body systems

the four cells are different shapes because they come from different parent organisms

Cell 3 and Cell 4 have the longest DNA sequences because they have a longer shape

Which structural feature of the cell membrane allows molecules such as oxygen and carbon dioxide to diffuse into and out of the cell?

the cell membrane is made up of two layers of phosopholipids

the cell membrane is anchored to the cytoplasm by the cytoskeleton

the cell membrane contains cholesterol molecules

the cell membrane contains protein molecules

Which process describes how a nerve cell maintains homeostasis in regards to the Na+ and K+ concentrations?

by transporting both types of ions through protein pumps within the cell membrane

by converting the sodium ions present inside the cell into potassium ions.

by producing more potassium ions inside the cell and eliminating sodium ions as waste

by blocking both types of ions from moving into or out of the cell membrane

Chemosynthesis is a cellular process used by organisms in deep sea ecosystems in the absence of light. A chemical equation for chemosynthesis is shown. How is chemosynthesis different from photosynthesis?

Chemosynthesis harvests energy from other chemical compounds

Chemosynthesis requires carbon dioxide

Chemosynthesis produces energy in the form of sugars

Chemosynthesis is used by autotrophic organisms

A student performs an experiment to study the transport of water in and out of cells. He uses clear, semi-permeable plastic bags the represent the cell membrane. The student places three plastic bags of the same size, each containing a 1% sucrose solution into three different beakers. One beaker contains distilled water, another beaker contains 3% concentration sucrose solution, and the third beaker contains a 1% concentration sucrose solution. The diagram shows the student's experimental setup, the plastic bag before it is placed in the beakers, and the appearance of the bags after an hour in each solution. Which statement provides a conclusion about the transport of water in and out of cells based on the results of the student's experiment?

water movement into the cell is dependent on the percent concentration of solutes both inside and outside the cell

water transports solutes out of the cell to balance the percent concentration of solutes both inside and outside the cell

water moves freely both inside and outside of the cell independent of the solute concentration

water moves into the cell and solutes move out of the cell to ensure their concentration is balanced both inside and outside the cell

What does the cell membrane do?

regulates what enters & exits cell

Cells EOC Review

Authored by Katelyn Calder

Biology

9th Grade

NGSS covered

Used 7+ times

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MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which macromolecule is described in the table?

carbohydrate

lipid

protein

nucleic acid

Which macromolecule is described in the table?

carbohydrate

lipid

protein

nucleic acid

Which macromolecule is described in the table?

carbohydrate

lipid

protein

nucleic acid

Which macromolecule is described in the table?

carbohydrate

lipid

protein

nucleic acid

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What is the purpose of an enzyme?

give permission for the reaction

raise activation energy

speed up reactions

control how many reactions occur

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Enzymes are an example of

Lipids

Carbohydrate

Protein

Nucleic Acid

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Based on the graph, what is the optimal temperature for this enzyme?

15^oC

40^oC

30^oC

35^oC

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Cells EOC Review

Which macromolecule is described in the table?

Which macromolecule is described in the table?

Which macromolecule is described in the table?

Which macromolecule is described in the table?

What is the purpose of an enzyme?

Enzymes are an example of

Based on the graph, what is the optimal temperature for this enzyme?

Which of the following conclusions can be drawn from this graph?

What is the optimum pH of the enzyme shown in the graph?

Which chemical reaction most likely occurred in the presence of an enzyme?

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