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Bio practice 3 1. The 'photo' in photosynthesis means to do with... A. Light B. Dark C. Light and dark D. None of the above Correct Answer A. Light Explanation In photosynthesis, the process by which plants convert sunlight into energy, the term "photo" refers to light. This is because photosynthesis requires light energy to power the chemical reactions that convert carbon dioxide and water into glucose and oxygen. Without light, photosynthesis cannot occur, making light the correct answer.

Rate this question: 47 0 2. What is the function of root hair cells? A. To absorb oxygen B. To absorb water C. To absorb carbon dioxide. D. To absorb water and minerals/nutrients. E. All of the above

Correct Answer D. To absorb water and minerals/nutrients. Explanation Root hair cells are specialized cells found in the root system of plants. Their main function is to absorb water and minerals/nutrients from the soil. These cells have long, thin projections called root hairs that increase the surface area for absorption. They have a large number of transport proteins in their cell membranes that facilitate the uptake of water and nutrients. Therefore, the correct answer is "To absorb water and minerals/nutrients." Rate this question: 42 2 3. If a microscope had an objective lens of 10 times magnification and an objective lens of 20 times magnification, what would be the total magnification? A. 20 times magnification B. 50 times magnification C. 100 times magnification

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D. 200 times magnification Correct Answer C. 100 times magnification Explanation The total magnification in a microscope is calculated by multiplying the magnification of the objective lens by the magnification of the eyepiece. However, the magnification provided for the eyepiece is not given in the question. Assuming a standard eyepiece magnification of 10 times: Total Magnification = Objective Magnification × Eyepiece Magnification Given: Objective 1 Magnification = 10 times Objective 2 Magnification = 20 times Eyepiece Magnification = 10 times Total Magnification = (10 times) × (10 times) = 100 times Therefore, the correct answer is: C) 100 times magnification Rate this question: 30 0 4. DNA carries the instructions for an organism to grow. DNA stands for ..... A. Deoxyribose nucleic apple B. Deoxyribose nucleic apparatus

C. Deoxyribonucleic acid D. Deoxyribose nucleus acid Correct Answer C. Deoxyribonucleic acid Explanation DNA stands for Deoxyribonucleic acid. It is a molecule that carries the genetic instructions for the growth, development, functioning, and reproduction of all known organisms. It is composed of two long chains of nucleotides that are twisted into a double helix structure. The nucleotides in DNA contain a sugar called deoxyribose, hence the name Deoxyribonucleic acid. This molecule is essential for the storage and transmission of genetic information from one generation to the next. Rate this question: 28 2 5. Plants contain vascular bundles. These are a little like human veins and arteries. They contain two things: one carries water, and the other carries glucose solution. What are these two things? A. Cambium and glucose

B. Phloem and cambium C. Xylem and cambium D. Phloem and xylem Correct Answer D. Phloem and xylem Explanation Plants contain vascular bundles, which are similar to human veins and arteries. These vascular bundles contain two things: one is responsible for carrying water, and the other is responsible for carrying a glucose solution. The two things referred to in the question are phloem and xylem. Phloem is the tissue responsible for transporting the glucose solution, while xylem is responsible for transporting water. Rate this question: 27 0 6. What are the four bases that make up the code for DNA?

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A. T, A, G, and C B. T, A, D, and F C. T, E, C, and H D. T, A, G, and E Correct Answer A. T, A, G, and C Explanation The four bases that make up the code for DNA are T, A, G, and C. These bases are the building blocks of DNA and are responsible for carrying the genetic information. T (thymine) pairs with A (adenine), and G (guanine) pairs with C (cytosine) to form the double helix structure of DNA. These base pairs determine the genetic code and are essential for DNA replication and protein synthesis. Rate this question: 18 0 7.

Where does photosynthesis take place? A. Nucleus B. Vacuole C. Chloroplasts/chlorophyll D. Mitochondria Correct Answer C. Chloroplasts/chlorophyll Explanation Photosynthesis is the process by which plants convert sunlight into energy. It occurs in the chloroplasts, which contain chlorophyll, the pigment responsible for capturing sunlight. The chloroplasts are found in the cells of the plant's leaves, where they absorb light energy and use it to convert carbon dioxide and water into glucose and oxygen. The nucleus is responsible for controlling the cell's activities, the vacuole stores water and other substances, and the mitochondria produce energy through cellular respiration. Therefore, the correct answer is chloroplasts/chlorophyll. Rate this question:

17 0 8. DNA code tells the cell how to make... A. Glucose B. Oxygen C. Protein D. Blood Correct Answer C. Protein Explanation The DNA code contains instructions that guide the cell in making proteins. Proteins are essential molecules that perform various functions in the body, such as building and repairing tissues, regulating chemical reactions, and supporting the immune system. DNA is transcribed into RNA, which is then translated into proteins through a process called protein synthesis. Therefore, the correct answer is protein.

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Rate this question: 23 0 9. Animal cells have... A. Nucleus B. Cytoplasm C. Chloroplast D. Mitochondria E. Cell wall

Correct Answer(s) A. Nucleus B. Cytoplasm D. Mitochondria Explanation Animal cells have a nucleus, cytoplasm, and mitochondria. The nucleus is the control center of the cell, containing the genetic material and regulating cell activities. Cytoplasm is a gel-like substance that fills the cell, providing a medium for cellular processes. Mitochondria are the powerhouse of the cell, responsible for generating energy through cellular respiration. Chloroplasts are not present in animal cells, as they are responsible for photosynthesis in plant cells. Cell walls are also absent in animal cells, as they are unique to plant cells and provide structural support. Rate this question: 22 0 10. Animals without backbones are called vertebrates. A. True B. False Correct Answer B. False

Explanation The statement is incorrect. Animals without backbones are called invertebrates, not vertebrates. Vertebrates are animals that have a backbone or spinal column. Rate this question: 15 3 11. For seeds to germinate, they need... A. Water B. Warmth C. Light D. Oxygen Correct Answer(s) A. Water

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B. Warmth D. Oxygen Explanation Seeds need water, warmth, and oxygen to germinate. Water is essential for the activation of enzymes that initiate germination. Warmth provides the necessary temperature for the enzymatic reactions to occur. Oxygen is required for respiration, which provides energy for the germination process. Light, although important for the growth of the seedling after germination, is not necessary for the actual germination process itself. Rate this question: 12 4 12. Biology is the study of: A. Light B. Life C. Logic

D. All of the above Correct Answer B. Life Explanation Biology is the study of life, encompassing the examination of living organisms, their structure, function, growth, evolution, and distribution. It focuses on understanding the various processes and systems that occur within living organisms, including their interactions with the environment. Therefore, the correct answer is "life" because biology is specifically concerned with the study of living things.

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