What is the correct description of the transport in the image?

many molecules coming into the cell using a membrane vesicle (endocytosis)

small molecules crossing the lipid bilayer (diffusion)

large molecules crossing through a protein (facilitated diffusion)

many molecules coming out of the cell using a vesicle to fuse with the membrane (exocytosis)

What is the correct description of the transport in the image?

small molecules crossing the lipid bilayer (diffusion)

large molecules crossing through a protein (facilitated diffusion)

many molecules coming into the cell using a membrane vesicle (endocytosis)

many molecules coming out of the cell using a vesicle to fuse with the membrane (exocytosis)

Facilitated diffusion and protein pumps are similar because

They both involve the movement of molecules through proteins

They both require energy to function

They both move molecules from high to low concentration

They both can only move molecules in one direction

Facilitated diffusion and protein pumps are different because

Protein pumps require energy while facilitated diffusion does not

Both move movement of molecules from high concentration to low concentration

Facilitated diffusion requires energy while protein pumps do not

Both move molecules from low to high concentration

Using the image, choose the correct form of transport and explanation of how you know:

Passive transport because the molecules are moving from high to low concentration

Active transport, because the molecules are crossing the membrane using a protein

Passive transport because the molecules are crossing the membrane using a protein

Active transport because the molecules are moving from low to high concentration

Organize these options into the right type of transport:

molecules move WITH the gradient

molecules move AGAINST the gradient

molecules move from high concentration to low

molecules move from low concentration to high

What happens during osmosis?

Movement of water molecules from an area of high water concentration to an area of low water concentration

Transfer of energy from one place to another

Movement of small molecules from high concentration to low concentration

Process of breaking down food into simpler substances

Which TWO of the following can be used to identify ACTIVE transport?

Movement of molecules from low to high concentration

Movement of molecules from high to low concentration

The skin of a slug is similar to a semi-permeable membrane. Like semi-permeable membrane in a cell allows water to enter or exit, the skin of a slug allows for the transport of water to and from its surroundings. However, the skin of a slug can also absorb harmful substances from its environment. This is why some farmers in Florida use a sodium chloride salt solution to control the slug population on their farms. When the slugs come into contact with the salt solution the slugs will ultimately die. How does the process of osmosis cause the body of the slug to dehydrate and eventually die?

The movement of water out of the cell occurs because there is a higher concentration of solute on the outside of the skin.

The movement of water into the cell occurs because there is a lower concentration of solute on the outside of the skin.

The movement of water out of the cell occurs because there is a lower concentration of solute on the outside of the skin.

Match each macromolecule with its function(s).

Stores excess energy Makes up cell membrane Insulation/Cushion

Stores and transmits genetic information

Main source of energy Quick access energy

Support structures (hair, muscles, cell membranes, skin) Speed up reactions (enzymes) Send messages (hormones)

Maya is studying biology and learns that two of the four classes of organic compounds are proteins and nucleic acids. What is the relationship between proteins and nucleic acids?

Nucleic acids contain the information to make proteins

Nucleic acids use proteins for energy

Nucleic acids are a subset of proteins

Proteins are long polymers of nucleic acids

Avery is studying the role of carbohydrates in plants for her biology project. She learns that carbohydrates are a macromolecule that can be broken down to provide energy, but they also play an additional role in plants. What is the important role played by carbohydrates, specifically cellulose, in plants beyond providing energy to the organism?

Cellulose fibers are strong and provide plants with structural support.

Cellulose absorbs sunlight and influences the rate of photosynthesis.

Cellulose is indigestible, so it deters organisms from eating the plant.

Cellulose forms a waxy, water-repellent protective surface on the leaves.

A table with four examples of proteins are shown below. Which of the following best matches the function to the types of proteins?

Metabolism: Cellulase and Helicase Structure: Keratin and Sclerotin

Metabolism: Keratin and Helicase Structure: Cellulase and Sclerotin

Metabolism: Keratin and Sclerotin Structure: Cellulase and Helicase

Metabolism: Cellulase and Sclerotin Structure: Keratin and Helicase

Emma is considering a health supplement for her dog that claims to build lean muscle and strengthen tendons and ligaments, as well as provide energy. Which two biomolecules must the supplement contain to provide these benefits?

nucleic acids and carbohydrates

Abigail is preparing for her biology exam and decides to make a Venn Diagram to compare functions of carbohydrates and lipids. Which cellular function of carbohydrates and lipids should be placed in the shared section of the Venn Diagram?

Structural support of the cell walls

Catalyst for chemical reactions

A table of four types of carbohydrates is shown. Which list correctly matches the functions to the types of carbohydrates

Energy: glycogen and starch Structure: cellulose and chitin

Energy: cellulose and chitin Structure: glycogen and starch

Energy: chitin and glycogen Structure: cellulose and starch

Energy: cellulose and starch Structure: chitin and glycogen

Harper, a biochemist, is studying a complex carbohydrate that was extracted from an insect. Its chemical structure makes it unlikely that it is used as an energy source. Where on the insect could this complex carbohydrate be found and why is it there?

It's found in the cells in the exoskeleton to provide support and structure.

It's found in the cells in the digestive system to aid digestion.

It's found in the nucleus of cells to help produce new DNA.

It's found in ribosomes of cells to help build proteins.

Which organic molecule would a long-distance runner most likely choose to eat two hours before a race?

A carbohydrate because it releases energy quickly.

A protein, because it builds muscle mass.

A lipid because it provides long term energy storage.

A protein, because it transports oxygen into the blood stream.

Enzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?

reducing the number of products

increasing the temperature of the cell

increasing the concentration of reactants

An enzyme speeds up a reaction by

lowering the activation energy.

The enzyme amylase helps the body breakdown starch in food and functions optimally at body temperature (37 C). A young child runs a fever of 40C for 24 hours. Predict the effect this may have on his digestion.

Digestion will decrease because the shape of the enzyme is altered past optimal temperature.

Digestion will increase because starch molecules are colliding faster with the enzyme.

Digestion will increase because enzyme activity improves at higher temperature.

Digestion will decrease because starch molecules are colliding faster with the enzyme.

Provides structure for the cell

Unit 2: Cellular Biochemistry Exam

Authored by ASHLEY PARK

Biology

9th - 12th Grade

NGSS covered

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MULTIPLE SELECT QUESTION

1 min • 5 pts

Which biomolecules (THREE) are found in the cell membrane?

lipids

proteins

nucleic acids

carbohydrates

MULTIPLE CHOICE QUESTION

45 sec • 5 pts

Which biomolecule makes up MOST of the cell membrane?

proteins

carbohydrates

phospholipids

nucleic acids

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Which biomolecule helps LARGE molecules cross the membrane?

phospholipids

carbohydrates

nucleic acids

proteins

HOTSPOT QUESTION

1 min • 5 pts

Which TWO parts of the membrane allow molecules to pass through?

MATCH QUESTION

1 min • 5 pts

Match the following functions to each biomolecule in the cell membrane:

phospholipids

transport LARGE/charged molecules through the membrane

proteins

allow small molecules to pass through the membrane

carbohydrates

cell recognition

MULTIPLE CHOICE QUESTION

1 min • 5 pts

How does the cell membrane help maintain homeostasis in each cell?

The cell membrane allows all substances to pass through freely

The cell membrane controls the movement of substances in and out of the cell

The cell membrane provides energy for the cell

The cell membrane produces proteins necessary for cell function

Passive transport (a) require energy because it moves (b) the concentration gradient, from (c) .

does NOT

does

with

against

high to low

low to high

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Unit 2: Cellular Biochemistry Exam

Which biomolecules (THREE) are found in the cell membrane?

Which biomolecule makes up MOST of the cell membrane?

Which biomolecule helps LARGE molecules cross the membrane?

Which TWO parts of the membrane allow molecules to pass through?

Match the following functions to each biomolecule in the cell membrane:

How does the cell membrane help maintain homeostasis in each cell?

Passive transport ​ (a) require energy because it moves ​ (b) the concentration gradient, from ​ (c) .

Active transport ​ (a) require energy because it moves ​ (b) the concentration gradient, from ​ (c) .

What is the correct description of the transport in the image?

What is the correct description of the transport in the image?

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Passive transport (a) require energy because it moves (b) the concentration gradient, from (c) .

Active transport (a) require energy because it moves (b) the concentration gradient, from (c) .