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Human Biology

Human Biology. MCQ Unit 1. 2. Which of the following tissues is rich in both actin and myosin. Muscle tissue Liver tissue Nerve tissue Adipose tissue. 4. The specificity of an enzyme is determined by the. Presence of an inhibitor Substrate concentration

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Human Biology

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  1. Human Biology MCQ Unit 1

  2. 2. Which of the following tissues is rich in both actin and myosin • Muscle tissue • Liver tissue • Nerve tissue • Adipose tissue

  3. 4. The specificity of an enzyme is determined by the • Presence of an inhibitor • Substrate concentration • State of equilibrium of the reaction • Molecular structures of substrate and enzyme

  4. 11. The cell shown is magnified 300x. What is the actual size of the cell? • 6 m • 60 m • 54 m • 540 m 18mm

  5. 13. A DNA molecule could be formed from a molecule of phosphate together with: • Ribose sugar and guanine • Ribose sugar and uracil • Deoxyribose sugar and guanine • Deoxyribose sugar and uracil

  6. 14. If a DNA molecule contains 8000 nucleotides of which 20% are adenine, then the number of guanine nucleotides present is: • 1600 • 2000 • 2400 • 3200

  7. 15. A section of DNA has the sequence:AATCGCTTCIdentify the 3 anticodons complementary to the mRNA molecule transcribed from this DNA • AAU CGC UUC • AAT CGC TTC • TTA GCG AAG • UUA GCG AAG

  8. 16. The cell organelle shown is magnified ten thousand times. What is its real size? • 0.04 m • 0.4 m • 4 m • 40 m 40mm

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