Biology Chapter: Enzyme Activity and Gas Exchange

What is the optimum temperature for enzyme activity in the human body?

High temperatures lead to increased enzyme activity by maintaining the shape of the enzyme.

What is diffusion?

During respiration, oxygen diffuses from the alveoli into __________.

Which of the following factors does NOT influence the rate of diffusion?

Active transport requires energy to move particles against a concentration gradient.

Match the processes with their descriptions:

Explain how temperature affects diffusion.

What are the primary components that make up proteins?

Starch is made from fatty acids and glycerol.

Define osmosis.

Iodine tests for ______.

Match the following polymers with their respective monomers:

What happens to a plant cell in a concentrated solution?

Higher temperatures decrease the rate of diffusion.

What is the initial color of Benedict's solution?

A positive Biuret test for protein turns the solution ______.

What is the primary purpose of diffusion in living organisms?

What occurs to enzymes at temperatures above their optimum temperature?

Lower temperatures increase enzyme activity due to higher kinetic energy.

What is the process of net movement of particles from higher concentration to lower concentration called?

Oxygen diffuses from the alveoli to the red blood cells due to a __________ concentration gradient.

Match the following factors that influence diffusion with their effects:

Which of the following best describes active transport?

Higher temperatures slow down the process of diffusion.

Plants take in __________ gas during photosynthesis through diffusion.

Which statement accurately describes osmosis?

Proteins are made from glucose.

What color does iodine change to when starch is present?

Cellulose contributes to the structure of __________.

Match the following biochemical tests with their positive results:

Which of the following is a factor that increases the rate of diffusion?

Animal cells become lysed when placed in a concentrated solution.

What are the monomers of fats?

Large molecules such as starch and proteins are made from __________.

What happens to a plant cell in pure water?

What happens to enzymes at temperatures above their optimum temperature?

Higher temperatures increase the kinetic energy of particles, resulting in slower diffusion.

Define the term 'diffusion'.

Which factor does NOT influence the rate of diffusion?

Match the following terms with their descriptions:

Active transport occurs without the use of energy.

Describe the role of surface area in the process of diffusion.

Which of the following correctly lists the chemical elements that make up carbohydrates?

Plant cells become flaccid when placed in pure water.

What is the positive test result color for glucose when using Benedict's solution?

Osmosis involves water moving from a region of higher water potential to a region of __________ water potential.

What effect does increasing temperature have on the rate of diffusion?

Cellulose provides structure to animal cell membranes.

What term describes the process of water movement through a partially permeable membrane?

In a concentrated solution, plant cells will experience __________, losing water and shrinking.

Which biochemical test turns purple in the presence of protein?

What happens to enzymes when the temperature exceeds their optimum level?

What effect does increasing temperature have on enzyme activity up to the optimum temperature?

Oxygen diffuses from the alveoli into __________ cells.

Match the following factors to their effects on diffusion:

Which of the following substances diffuses into plants during photosynthesis?

A steeper concentration gradient slows down the rate of diffusion.

What is the main consequence of low temperatures on enzyme activity?

What is the primary function of osmosis in plant cells?

Proteins are made from fatty acids and glycerol.

What occurs to an animal cell when placed in pure water?

The __________ test is used to indicate the presence of lipids.

Match the following polymers with their corresponding monomers:

Which of the following statements about diffusion is true?

Gaseous exchange in the lungs involves carbon dioxide diffusing from red blood cells to alveoli.

What color does iodine turn in the presence of starch?

Water moves through a __________ membrane by osmosis.

What is the role of surface area in the process of diffusion?