The main function of the cell wall is to

direct the activities of the cell.

What is the purpose of mitosis?

It ensures that the nuclei in each daughter cell have the same amount of DNA.

It guarantees that each daughter cell has half the amount of DNA of parent cells.

It ensures the reproduction of mitochondria and chloroplasts.

It prevents the occurrence of cancer cells.

Erwin Chargaff studied the DNA of organisms within a single species. Chargaff discovered that the amount of adenine is about equal to the amount of thymine. Which of these explains why the ratio of adenine to thymine is nearly 1:1?

Adenine and thymine pair with each other.

Adenine binds with phosphates, while thymine binds with nitrates.

Adenine and thymine are identical in chemical composition.

Adenine bases contain a form of thymine.

Which statement best describes the role of the cell membrane in this model?

The cell membrane allows water to enter and leave the cell.

The cell membrane is an impermeable barrier that prevents water from entering the cell.

The cell membrane allows solutes to enter the cell, which causes the cell to shrink.

The cell membrane removes solutes from the environment.

A person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which has occurred?

The water in the gums has moved from a high concentration to a low concentration of water

The swollen gums have absorbed the salt water solution

The salt water solution lowers the temperature of the water in the gums

The salt in the solution has moved against the concentration gradient

What in the above picture helped you decide that the picture shows facilitated diffusion?

Molecules move from high to low concentration through a protein channel

Molecules move from high to low concentration through the membrane

Molecules move from low to high concentration, using energy

Molecules are engulfed by an indentation in the membrane

The cellular process known as the sodium-potassium pump was discovered in the 1950s by Jens Christian Skou, a Danish scientist. This process is a form of active transport that moves three sodium ions to the outside of a cell for every two potassium ions that it moves into the cell. Which of these best explains why energy is needed for active transport?

Ions are moved against the concentration gradient

Ions are attached to large proteins

Ions are trapped inside the plasma membrane

Which of the following statements is the best explanation for what is occurring in the diagram above?

Molecules are moving against the gradient from an area of low to high concentration

Molecules are moving with the gradient from an area of high to low concentration.

Molecules are moving with the gradient from an area of low to high concentration

Molecules are moving against the gradient from an area of high to low concentration

The picture above shows a contractile vacuole of a unicellular freshwater organism. The contractile vacuole regulates the flow of water into and out of the cell in an aquatic environment. What conditions cause the contractile vacuole to fill with water?

The concentration of water is greater outside the cell than inside the cell

The temperature of water in the vacuole is higher than the temperature of its environment

The concentration of water inside the cell is the same as the concentration outside the cell

The temperature of water in the vacuole is lower than the temperature of its environment

Which two processes does the diagram above most directly model?

Homeostasis and transport of molecules

Energy conversions and synthesis of new molecules

Synthesis of new molecules and homeostasis

Transport of molecules and energy conversions

Catalase is an enzyme that speeds up the decomposition of hydrogen peroxide into water and oxygen. Students conducted two investigations to determine the ideal conditions for the function of catalase. One investigation compared catalase activity at different values of pH. The other investigation compared catalase activity at different temperatures. According to the data in the chart, which pH and temperature combination provides the best conditions for catalase to function?

pH of 7 and a temperature of 37°C

pH of 5 and a temperature of 4°C

pH of 5 and a temperature of 25°C

pH of 7 and a temperature of 50°C

Fireflies emit light. The production of light by an organism is called bioluminescence. To generate visible light, cells in a firefly’s tail produce thousands of luciferase enzymes. Luciferase binds to a chemical called luciferin. Once bound, the luciferase enzyme speeds up a chemical reaction that combines an oxygen molecule and luciferin to produce oxyluciferin. This reaction requires energy and releases light. Which of the following best describes how the luciferase enzyme speeds up the chemical reaction?

Luciferase decreases the amount of energy required for the reaction to start

Luciferase increases the amount of time the light is visible

Luciferase increases the number of sites on luciferin that must bind to oxygen

Luciferase decreases the temperature of the environment inside the body of the firefly

Midterm Exam Review 2020 #1

Authored by Keli Beck

Biology

9th Grade

NGSS covered

Used 47+ times

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is a correct graphical representation of the organizational levels of a biological system, which the outside circle being the physically largest type?

Tags

NGSS.HS-LS1-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What additional characteristic (X) belongs in the central section of the Venn diagram above?

ribosome

chloroplast

mitochondrion

endoplasmic reticulum

Tags

NGSS.HS-LS3-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Is the organism above a prokaryote or eukaryote?

Eukaryote - because it has

organelles similar to plants, animals, fungi and protists

Eukaryote - because the

organism is unicellular and has a nucleus

Prokaryote - because it is a

primitive life form and does not have a nucleus

Prokaryote - because it has

a plasma membrane, cell wall and a nucleus

Tags

NGSS.MS-LS4-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Identify the virus(es) in the diagrams above.

IV only

V only

I and III

II and V

MULTIPLE CHOICE QUESTION

1 min • 1 pt

One characteristic shared by a virus and living cell is that both--

store genetic information in

nucleic acids (DNA/RNA).

have a crystalline

structure.

gain energy directly from

the sun.

use glucose for cellular

respiration.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Choose the correct labels for the columns in the chart above.

I-Prokaryote II-Eukaryote III-Virus

I-Virus II-Bacteria III-Prokaryote

I-Virus II-Prokaryote III-Eukaryote

I-Prokaryote II-Eukaryote III-Plant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The endosymbiotic theory of eukaryote evolution states that organelles in eukaryotic cells are derived from prokaryotes.

Which statement is the strongest evidence in support of the endosymbiotic theory?

Eukaryotic organelles contain DNA similar to prokaryotic DNA.

Eukaryotic organelles stop functioning outside of a plant cell.

Eukaryotic organelles are similar in size and shape to prokaryotes.

Eukaryotic organelles can reproduce though sexual reproduction.

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Midterm Exam Review 2020 #1

Which of the following is a correct graphical representation of the organizational levels of a biological system, which the outside circle being the physically largest type?

What additional characteristic (X) belongs in the central section of the Venn diagram above?

Is the organism above a prokaryote or eukaryote?

Identify the virus(es) in the diagrams above.

One characteristic shared by a virus and living cell is that both--

Choose the correct labels for the columns in the chart above.

The endosymbiotic theory of eukaryote evolution states that organelles in eukaryotic cells are derived from prokaryotes.

Which statement is the strongest evidence in support of the endosymbiotic theory?

In which column on the chart above would the information below best fit for a mode of reproduction?

CANNOT REPRODUCE WITHOUT A HOST

The main function of the cell wall is to

Which specialized cell would have more mitochondria?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Biology

Midterm Exam Review 2020 #1

Which of the following is a correct graphical representation of the organizational levels of a biological system, which the outside circle being the physically largest type?

What additional characteristic (X) belongs in the central section of the Venn diagram above?

Is the organism above a prokaryote or eukaryote?

Identify the virus(es) in the diagrams above.

One characteristic shared by a virus and living cell is that both--

Choose the correct labels for the columns in the chart above.

The endosymbiotic theory of eukaryote evolution states that organelles in eukaryotic cells are derived from prokaryotes. Which statement is the strongest evidence in support of the endosymbiotic theory?

In which column on the chart above would the information below best fit for a mode of reproduction?CANNOT REPRODUCE WITHOUT A HOST

The main function of the cell wall is to

Which specialized cell would have more mitochondria?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Biology

The endosymbiotic theory of eukaryote evolution states that organelles in eukaryotic cells are derived from prokaryotes.

Which statement is the strongest evidence in support of the endosymbiotic theory?

In which column on the chart above would the information below best fit for a mode of reproduction?

CANNOT REPRODUCE WITHOUT A HOST