7th Grade Life Science Quiz

Reviewed by Editorial Team
The ProProfs editorial team is comprised of experienced subject matter experts. They've collectively created over 10,000 quizzes and lessons, serving over 100 million users. Our team includes in-house content moderators and subject matter experts, as well as a global network of rigorously trained contributors. All adhere to our comprehensive editorial guidelines, ensuring the delivery of high-quality content.
Learn about Our Editorial Process
| By Richgurly123
R
Richgurly123
Community Contributor
Quizzes Created: 1 | Total Attempts: 793
| Attempts: 793
Quiz Flashcard
SettingsSettings
Please wait...
  • 1/24 Questions

    A large particle can leave a cell by an active transport process called

    • Endocytosis
    • Exocytosis
Please wait...
About This Quiz

This 7th Grade Life Science quiz assesses understanding of cell biology, focusing on the movement of materials across cell membranes, diffusion, and osmosis. It highlights key processes crucial for cell function and organism survival.

Cell Biology Quizzes & Trivia

Quiz Preview

  • 2. 

    What a cell need to transport particles by active transport

    • Active

    • Passive

    • Diffusion and osmosis

    • Energy

    Correct Answer
    A. Energy
    Explanation
    In order for a cell to transport particles by active transport, it requires energy. Active transport is a process that moves particles against their concentration gradient, from an area of lower concentration to an area of higher concentration. This process requires the cell to expend energy to pump the particles across the cell membrane. Without energy, the cell would not be able to carry out active transport and transport particles against their concentration gradient.

    Rate this question:

  • 3. 

    Two examples of passive transport

    • Channels

    • Active

    • Passive

    • Diffusion and osmosis

    Correct Answer
    A. Diffusion and osmosis
    Explanation
    Passive transport refers to the movement of molecules across a cell membrane without the use of energy. Diffusion is a passive transport process where molecules move from an area of higher concentration to an area of lower concentration. Osmosis is another example of passive transport, specifically the diffusion of water molecules through a selectively permeable membrane, from an area of lower solute concentration to an area of higher solute concentration. Both diffusion and osmosis occur naturally and do not require the cell to expend energy.

    Rate this question:

  • 4. 

    The diffusion of water through a semipermeable membrane is called

    • Water

    • Molecules

    • Diffusion

    • Osmosis

    Correct Answer
    A. Osmosis
    Explanation
    Osmosis is the correct answer because it refers to the diffusion of water through a semipermeable membrane. In osmosis, water molecules move from an area of lower solute concentration to an area of higher solute concentration, in order to equalize the concentration on both sides of the membrane. This process is important for maintaining the balance of water and solutes in living organisms.

    Rate this question:

  • 5. 

    Water is made up of particles called

    • Water

    • Molecules

    • Diffusion

    • Osmosis

    Correct Answer
    A. Molecules
    Explanation
    Water is made up of particles called molecules. Molecules are the smallest unit of a substance that retains its chemical properties. In the case of water, each water molecule is made up of two hydrogen atoms bonded to one oxygen atom. These molecules are constantly moving and interacting with each other, giving water its unique properties such as its ability to dissolve many substances and its high heat capacity. Therefore, the correct answer is molecules.

    Rate this question:

  • 6. 

    What happens to a ell during the process of exocytosis

    • Vesicles form sacs from pieces of the cell membrane

    • Carries particles to the membrane. Vesicle fuses with cell membrane and release particles outside of cell.

    Correct Answer
    A. Carries particles to the membrane. Vesicle fuses with cell membrane and release particles outside of cell.
    Explanation
    During the process of exocytosis, an ell (presumably meant to be "cell") forms vesicles that are sacs made from pieces of the cell membrane. These vesicles carry particles to the cell membrane. Subsequently, the vesicle fuses with the cell membrane, allowing the particles to be released outside of the cell.

    Rate this question:

  • 7. 

    How does the movement of materials across the cell membrane relate to an organism's survival?

    • Controlls what gets in and out

    • Because their cells are mostly water

    • They shrivel up

    • It ferns up and takes its normal shape again

    Correct Answer
    A. Controlls what gets in and out
    Explanation
    The movement of materials across the cell membrane is crucial for an organism's survival because it controls what substances enter and exit the cell. This regulation ensures that essential nutrients and molecules necessary for cellular processes can enter the cell, while waste products and harmful substances can be expelled. Without this control, the cell would not be able to maintain homeostasis and carry out its functions effectively.

    Rate this question:

  • 8. 

    Describe what happens in osmosis

    • Water travels into cells

    • Because their cells are mostly water

    • They shrivel up

    • It ferns up and takes its normal shape again

    Correct Answer
    A. Water travels into cells
    Explanation
    Osmosis is the process by which water molecules move from an area of lower solute concentration to an area of higher solute concentration through a selectively permeable membrane. In this case, water travels into cells because their cells are mostly water. This movement of water helps to maintain the balance of solutes inside and outside the cells. It is important for various cellular processes and ensures that cells do not shrivel up or become dehydrated.

    Rate this question:

  • 9. 

    Describe what would happen if you put red blood cells into a salty solution

    • Water travels into cells

    • Because their cells are mostly water

    • They shrivel up

    • It ferns up and takes it normal shape again

    Correct Answer
    A. They shrivel up
    Explanation
    When red blood cells are placed in a salty solution, the concentration of solutes outside the cells becomes higher than inside the cells. This creates a hypertonic environment, causing water to move out of the cells through osmosis. As a result, the red blood cells lose water and shrink in size, a process known as cell shrinkage or cell shrinkage. Therefore, the correct answer is that the red blood cells shrivel up.

    Rate this question:

  • 10. 

    A large particle can enter a cell by an active transport process called

    • Endocytosis

    • Exocytosis

    Correct Answer
    A. Endocytosis
    Explanation
    Endocytosis is the correct answer because it is a process by which large particles can enter a cell. During endocytosis, the cell membrane surrounds the particle and forms a vesicle, which then brings the particle into the cell. This process requires energy and is considered a form of active transport. Exocytosis, on the other hand, is the process by which particles are released from the cell, not brought into it. Therefore, endocytosis is the correct active transport process for the entry of large particles into a cell.

    Rate this question:

  • 11. 

    The movement of particle from areas of high concentration to areas of low concentration is called

    • Water

    • Molecules

    • Diffusion

    • Osmosis

    Correct Answer
    A. Diffusion
    Explanation
    Diffusion is the movement of particles from areas of high concentration to areas of low concentration. This process occurs due to the random motion of particles, where they spread out to achieve a state of equilibrium. It is a fundamental process in nature that allows substances to move and mix, such as the spreading of a scent in a room or the movement of oxygen into our cells during respiration. Diffusion does not require a membrane or any specific medium, unlike osmosis which specifically refers to the movement of water molecules across a semi-permeable membrane.

    Rate this question:

  • 12. 

    Describe what happens to a wilted plant when it is watered

    • Water travels into cells

    • Because their cells are mostly water

    • They shrivel up

    • It ferns up and takes its normal shape again

    Correct Answer
    A. It ferns up and takes its normal shape again
    Explanation
    When a wilted plant is watered, the water travels into the plant's cells. This helps to replenish the lost water and nutrients, causing the plant to rehydrate. As a result, the plant's cells become turgid and regain their normal shape, causing the plant to "fern up" and regain its original healthy appearance.

    Rate this question:

  • 13. 

    Passageways in a cell membrane

    • Channels

    • Active transport

    • Passive Transport

    • Diffusion and osmosis

    Correct Answer
    A. Channels
    Explanation
    Channels are passageways in a cell membrane that allow the transport of specific molecules or ions across the membrane. Unlike active transport, which requires energy, channels facilitate passive transport, specifically diffusion and osmosis. Channels provide a selective pathway for the movement of substances, allowing them to cross the cell membrane more easily. Therefore, channels are the correct answer in this context.

    Rate this question:

  • 14. 

    The fluids that surround and fill a cell are mad emostly of

    • Water

    • Molecules

    • Diffusion

    • Osmosis

    Correct Answer
    A. Water
    Explanation
    The fluids that surround and fill a cell are mostly made of water. Water is essential for cellular processes and provides a medium for molecules to move and interact within the cell. It helps to maintain the cell's shape, transport nutrients and waste products, and regulate temperature. Without water, cells would not be able to function properly and maintain homeostasis.

    Rate this question:

  • 15. 

    Controls all cell activity and is  found in both animal and plant

    • Nucleus

    • Ncleolus

    • Cell membrane

    • Cell wall

    Correct Answer
    A. Nucleus
    Explanation
    The nucleus is the correct answer because it controls all cell activity and is found in both animal and plant cells. It contains the cell's DNA and is responsible for regulating gene expression and directing cell division. The nucleus acts as the control center of the cell, coordinating all cellular processes and maintaining the cell's overall function and structure.

    Rate this question:

  • 16. 

    Particels moving across a cell membrane without using energy

    • Channels

    • Active transport

    • Passive transport

    • Diffusion and osmosis

    Correct Answer
    A. Passive transport
    Explanation
    Passive transport refers to the movement of particles across a cell membrane without requiring energy. This process occurs through channels that allow the particles to passively diffuse from an area of higher concentration to an area of lower concentration. Unlike active transport, which requires energy, passive transport relies on the natural concentration gradient of the particles. Diffusion and osmosis are specific types of passive transport where particles move from an area of higher concentration to an area of lower concentration and the movement of water across a membrane, respectively.

    Rate this question:

  • 17. 

    The channels in a cell membrane are made up of

    Correct Answer
    Proteins
    Explanation
    The channels in a cell membrane are made up of proteins. Proteins are large molecules that play a crucial role in many biological processes. In the context of cell membranes, proteins form channels or pores that allow the passage of specific molecules or ions in and out of the cell. These channels are important for various cellular functions such as nutrient uptake, waste removal, and cell signaling. Therefore, the answer is proteins.

    Rate this question:

  • 18. 

    Main power source in a cell and is found in the plant and animal

    • Nucleus

    • Ribosome

    • Cell membrane

    • Mitochondria

    Correct Answer
    A. Mitochondria
    Explanation
    Mitochondria are the main power source in a cell and are found in both plant and animal cells. They are responsible for producing energy in the form of ATP through cellular respiration. Mitochondria have their own DNA and are believed to have originated from ancient bacteria that formed a symbiotic relationship with early eukaryotic cells. They have a double membrane structure and contain enzymes that are essential for the production of ATP. Therefore, mitochondria are the correct answer as they play a crucial role in energy production within cells.

    Rate this question:

  • 19. 

    Protective barrier that encloses a cell and is found both in the plant and animal cell

    • Nucleus

    • Cell membrane

    • Nucleolus

    • Cell wall

    Correct Answer
    A. Cell membrane
    Explanation
    The cell membrane is a protective barrier that encloses a cell and is found in both plant and animal cells. It regulates the movement of substances in and out of the cell, allowing nutrients to enter and waste products to exit. It also provides structural support and helps maintain the shape of the cell. The cell membrane is composed of a phospholipid bilayer with embedded proteins that control the transport of molecules and ions. Therefore, the cell membrane is the correct answer for this question.

    Rate this question:

  • 20. 

    Makes proteins and is found in the plant and animal cell

    • Nuleus

    • Cell membrane

    • Ribosome

    • Mitochondria

    Correct Answer
    A. Ribosome
    Explanation
    Ribosomes are responsible for protein synthesis in both plant and animal cells. They can be found in the cytoplasm or attached to the endoplasmic reticulum. Ribosomes read the genetic information from the nucleus and use it to assemble amino acids into proteins. Therefore, ribosomes play a crucial role in the production of proteins, which are essential for various cellular functions and processes.

    Rate this question:

  • 21. 

    Why is osmosis important to cell functions?

    • Water travels into cells

    • Because their cells are mostly water

    • They shrivel up

    • It ferns up and takes its normal shape again

    Correct Answer
    A. Because their cells are mostly water
    Explanation
    Osmosis is important to cell functions because cells are mostly composed of water. Osmosis is the process by which water molecules move from an area of lower concentration to an area of higher concentration, across a semi-permeable membrane. This movement of water is essential for maintaining the proper balance of water and solutes inside and outside of cells. It allows cells to regulate their internal environment, maintain their shape and size, and transport nutrients and waste products. Without osmosis, cells would not be able to function properly and may shrivel up or become damaged.

    Rate this question:

  • 22. 

    What happens to a cell during the process of endocytosis

    • Vesicles form sacs from pieces of the cell membrane

    • Carries particles to the membrane. Vesicle fuses with cell membrane and release particles outside of cell.

    Correct Answer
    A. Vesicles form sacs from pieces of the cell membrane
    Explanation
    During the process of endocytosis, vesicles form sacs from pieces of the cell membrane. This means that the cell membrane invaginates or folds inward, forming a vesicle that encloses the extracellular material or particles. This allows the cell to engulf and internalize substances from the external environment. The vesicle then carries these particles to the cell membrane, fuses with it, and releases the particles outside of the cell. This process is important for nutrient uptake, removal of waste, and regulation of cell signaling.

    Rate this question:

  • 23. 

    The movement of particles from an area of low concentration to an area of high concentration across a cell membrane

    • Channels

    • Active

    • Passive

    • Diffusion and osmosis

    Correct Answer
    A. Active
    Explanation
    Active transport is the correct answer because it involves the movement of particles from an area of low concentration to an area of high concentration across a cell membrane. This process requires the use of energy to transport molecules or ions against their concentration gradient. Active transport is carried out by specific proteins called pumps, which use ATP hydrolysis to move molecules across the membrane. This process is crucial for maintaining proper ion concentrations and for the uptake of nutrients in cells.

    Rate this question:

  • 24. 

    Which part of the plant is responsible for the process of photosynthesis?

    • Roots

    • Leaves

    • Stem

    • Flowers

    Correct Answer
    A. Leaves
    Explanation
    Photosynthesis, the process by which plants convert sunlight into energy, primarily occurs in the chloroplasts of leaves. While other parts of the plant have important functions, the leaves are the primary site for photosynthesis.

    Rate this question:

Quiz Review Timeline (Updated): Nov 1, 2024 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Nov 01, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 11, 2011
    Quiz Created by
    Richgurly123
Back to Top Back to top
Advertisement
×

Wait!
Here's an interesting quiz for you.

We have other quizzes matching your interest.