IGCSE Biology Questions And Answers

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 Bio101
B
Bio101
Community Contributor
Quizzes Created: 1 | Total Attempts: 23,565
| Attempts: 23,690
Quiz Flashcard
SettingsSettings
Please wait...
  • 1/10 Questions

    What is the role of enzymes in the human body?

    • Structural support
    • Transmit nerve impulses
    • Speed up chemical reactions
    • Protect against diseases
Please wait...
About This Quiz


Ready to test your understanding of biology? Our IGCSE Biology Questions and Answers Quiz is here to help you prepare for your exams with confidence. This quiz covers all the essential topics required for the IGCSE curriculum, from cell biology and genetics to human physiology and ecology.

Whether you're looking to ace your IGCSE Biology exam or just want to ensure you've got a solid grasp of the subject, this quiz is tailored to provide a comprehensive and effective revision experience. Get ready to challenge yourself and confirm your mastery of biology. Let's get started and see how well you know your biology.

IGCSE Biology Questions And Answers - Quiz

Quiz Preview

  • 2. 

    What is the primary site of photosynthesis in plants?

    • Roots

    • Stems

    • Flowers

    • Leaves

    Correct Answer
    A. Leaves
    Explanation
    Leaves are the primary site of photosynthesis in plants. This process involves converting light energy, usually from the sun, into chemical energy stored in glucose. Leaves are well-suited for this task due to their broad, flat surfaces which maximize light absorption. They contain chloroplasts, which are organelles that hold chlorophyll. Chlorophyll captures light energy, which is then used to convert carbon dioxide from the air and water from the soil into sugars and oxygen.

    Rate this question:

  • 3. 

    Which hormone regulates the blood sugar level?

    • Insulin

    • Adrenaline

    • Estrogen

    • Thyroxine

    Correct Answer
    A. Insulin
    Explanation
    Insulin is a hormone produced by the pancreas that regulates blood sugar levels. It facilitates the uptake of glucose from the blood into cells, where it can be used for energy, thereby lowering blood glucose levels. Insulin's role is critical in preventing hyperglycemia, a condition characterized by excessively high blood sugar levels that can lead to serious health problems, including diabetes type 2.

    Rate this question:

  • 4. 

    Which organelle is responsible for energy production in cells?

    • Golgi apparatus

    • Nucleus

    • Mitochondrion

    • Endoplasmic reticulum

    Correct Answer
    A. Mitochondrion
    Explanation
    The mitochondrion is known as the powerhouse of the cell because it produces adenosine triphosphate (ATP), the cell’s main energy currency. This process, known as cellular respiration, involves the conversion of the energy stored in glucose into ATP. Mitochondria have their own set of DNA and are involved in several other essential functions, including the regulation of the cell cycle and cell growth.

    Rate this question:

  • 5. 

    Which process describes the movement of water through a plant?

    • Transcription

    • Photosynthesis

    • Transpiration

    • Respiration

    Correct Answer
    A. Transpiration
    Explanation
    Transpiration is the process through which water moves through plants from roots to leaves, then evaporates into the atmosphere primarily from the stomata in the leaves. This movement of water is crucial for the transport of nutrients from the soil, maintaining the structure of the plant, and cooling the plant on hot days. The process is driven by the evaporation of water at the leaf surface, creating a negative pressure that pulls water up from the roots through the xylem vessels.

    Rate this question:

  • 6. 

    What is the function of ribosomes in a cell?

    • Energy production

    • Protein synthesis

    • DNA replication

    • Waste removal

    Correct Answer
    A. Protein synthesis
    Explanation
    Ribosomes are essential cellular organelles responsible for protein synthesis. They read messenger RNA (mRNA) sequences that have been transcribed from DNA and use the information to assemble amino acids into polypeptide chains. These chains fold into functional proteins that perform numerous tasks within the cell and throughout the body. Ribosomes can be found floating freely within the cytoplasm or attached to the endoplasmic reticulum, facilitating the production of proteins that are needed both inside and outside of the cell.

    Rate this question:

  • 7. 

    Which type of cell lacks a defined nucleus?

    • Animal

    • Plant

    • Fungal

    • Prokaryotic

    Correct Answer
    A. Prokaryotic
    Explanation
    Prokaryotic cells, unlike eukaryotic cells of animals, plants, and fungi, do not have a defined nucleus. Instead, their genetic material is contained in a single, circular strand of DNA that floats freely within the cell in a region called the nucleoid. This lack of a membrane-bound nucleus and other organelles allows prokaryotes to have faster growth rates and simpler cellular organization, which are advantages in many environments.

    Rate this question:

  • 8. 

    What is genetic material composed of in a cell?

    • Proteins

    • Lipids

    • Carbohydrates

    • Nucleic acids

    Correct Answer
    A. Nucleic acids
    Explanation
    Nucleic acids are the molecules that make up genetic material, which includes DNA and RNA. These molecules are vital for storing and transmitting genetic information from one generation to the next and are crucial for the synthesis of proteins. DNA molecules are composed of two strands forming a double helix, whereas RNA is typically single-stranded.

    Rate this question:

  • 9. 

    What process leads to the creation of gametes?

    • Mitosis

    • Meiosis

    • Binary fission

    • Budding

    Correct Answer
    A. Meiosis
    Explanation
    Meiosis is a specialized type of cell division that results in four daughter cells, each with half the number of chromosomes of the parent cell. This process is essential for producing gametes in sexually reproducing organisms. It introduces genetic diversity through phases like crossing over and independent assortment, where different traits are mixed before the gametes are formed, contributing to genetic variation in populations.

    Rate this question:

  • 10. 

    Which vitamin is essential for the coagulation of blood?

    • Vitamin A

    • Vitamin B12

    • Vitamin C

    • Vitamin K

    Correct Answer
    A. Vitamin K
    Explanation
    Vitamin K is crucial for the synthesis of proteins required for blood coagulation. Without Vitamin K, the blood clotting process is severely impaired, leading to increased bleeding and bruising. This vitamin acts as a cofactor for an enzyme that catalyzes the carboxylation of specific protein residues, which is essential for activating the proteins that mediate clotting.

    Rate this question:

Quiz Review Timeline (Updated): Jul 17, 2024 +

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

  • Current Version
  • Jul 17, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • May 21, 2012
    Quiz Created by
    Bio101

Popular Topics

Back to Top Back to top
Advertisement
×

Wait!
Here's an interesting quiz for you.

We have other quizzes matching your interest.