Keystone biology Module A

Which process involves the movement of molecules from an area of high concentration to an area of low concentration without using energy?

• a. Osmosis
• b. Active transport
• c. Passive transport
• d. Endocytosis

What is the process by which living organisms maintain a stable internal environment?

• a. Photosynthesis
• b. Homeostasis
• c. Fermentation
• d. Aerobic respiration

The smallest unit of life is the:

• a. Organism
• b. Cell
• c. Tissue
• d. Organ

What organelle is responsible for producing energy (ATP) in a cell?

• a. Ribosome
• b. Mitochondrion
• c. Golgi apparatus
• d. Endoplasmic reticulum

What is the primary function of the cell membrane?

• a. Regulate the passage of substances into and out of the cell
• b. Store genetic information
• c. Produce proteins
• d. Break down cellular waste

Which of the following is TRUE about enzymes?

• They increase the activation energy of a reaction
• b. They are consumed in chemical reactions
• c. They are have an active site that has a specific shape for a specific substrate.
• d. They slow down metabolic processes

What is the main function of chloroplasts in plant cells?

• a. Protein synthesis
• b. Energy production
• c. Nutrient storage
• d. Photosynthesis

Which organelle is responsible for making proteins in the cell?

• Lysosome
• b. Ribosome
• c. Nucleus
• d. Cytoskeleton

Which type of transport requires energy input from the cell?

• a. Passive transport
• b. Osmosis
• c. Active transport
• d. Facilitated diffusion

The process of converting glucose into ATP in the presence of oxygen is known as:

• a. Fermentation
• b. Anaerobic respiration
• c. Photosynthesis
• d. Cellular respiration