Cell and Body System Multiple Choice Questions

Which body system helps you breathe?

• Skeletal

• Respiratory

• Muscular

• Digestive

Answer explanation

The respiratory system is responsible for breathing. It includes the lungs and airways, allowing oxygen to enter the body and carbon dioxide to be expelled, making it essential for respiration.

What is the control center of a cell?

• Mitochondria

• Cytoplasm

• Nucleus

• Cell wall

Answer explanation

The nucleus is the control center of a cell, containing the cell's genetic material and regulating activities such as growth, metabolism, and reproduction. It directs the cell's functions, making it essential for cellular operation.

Tags

NGSS.MS-LS1-2

What does the muscular system help you do?

• Send messages

• Move

• Grow

• Breathe

Answer explanation

The muscular system is essential for movement, allowing the body to perform various physical activities. While it also plays a role in breathing, the primary function highlighted here is movement.

Which part of the cell provides energy?

• Nucleus

• Mitochondria

• Ribosome

• Vacuole

Answer explanation

The mitochondria are known as the powerhouse of the cell because they generate ATP, the energy currency of the cell, through cellular respiration. Other organelles like the nucleus, ribosome, and vacuole do not provide energy.

Tags

NGSS.MS-LS1-2

All living things are made of cells.

• True

• False

Answer explanation

The statement is true because all living organisms, from the simplest bacteria to complex animals and plants, are composed of cells, which are the basic units of life.

Tags

NGSS.MS-LS1-1

Which type of cell has a cell wall?

• Animal

• Plant

• Blood

• Muscle

Answer explanation

Plant cells have a cell wall made of cellulose, which provides structure and support. In contrast, animal, blood, and muscle cells do not have cell walls, making 'Plant' the correct answer.

What does the skeletal system do?

• Help you breathe

• Pump blood

• Support and protect your body

• Carry oxygen

Answer explanation

The skeletal system provides support and protection for the body, forming the framework that holds everything together and safeguards vital organs, unlike the other options which relate to different body systems.

What is the job of red blood cells?

• Fight infections

• Carry oxygen

Answer explanation

Red blood cells are primarily responsible for carrying oxygen from the lungs to the body's tissues and returning carbon dioxide from the tissues back to the lungs. Therefore, the correct answer is 'Carry oxygen'.

Tags

NGSS.MS-LS1-2

Which body system protects your organs and helps you move?

• Skeletal

• Circulatory

• Respiratory

• Nervous

Answer explanation

The skeletal system protects your organs by providing a rigid structure and also facilitates movement by serving as attachment points for muscles, making it essential for both protection and mobility.

Which structure helps a plant cell stay rigid and strong?

• Nucleus

• Chloroplast

• Cell wall

• Cell membrane

Answer explanation

The vacuole is a large, fluid-filled organelle in plant cells that helps maintain turgor pressure, keeping the cell rigid and supporting the plant's structure. This is essential for plant health and growth.