Class 9 Practice Level 3 – Set 2 – The Fundamental Unit of Life Leave a Comment / By Gulam Hamza / August 26, 2024 Class 9 Practice Level 3 – Set 2 – The Fundamental Unit of Life Total questions: 15 1. The phase of the cell cycle in which the cell prepares for mitosis is called: Topic: Cell Division G1 phase S phase G2 phase M phase None 2. Which of the following statements about phospholipids is incorrect? Topic: Cell Membrane They form bilayers in aqueous environments. They have hydrophobic tails and hydrophilic heads. They are involved in energy storage. They are a major component of cell membranes. None 3. Mitochondrial DNA is inherited: Topic: Mitochondrial DNA Paternally Maternally Equally from both parents Randomly None 4. The enzyme ribulose bisphosphate carboxylase/oxygenase (RuBisCO) is involved in which process? Topic: Photosynthesis Light-dependent reactions Calvin cycle Glycolysis Krebs cycle None 5. Which component of the cytoskeleton is responsible for muscle contraction? Topic: Cytoskeleton Microtubules Intermediate filaments Actin filaments Centrioles None 6. Apoptosis is a process of: Topic: Apoptosis Uncontrolled cell growth Programmed cell death Cellular differentiation DNA replication None 7. Ribosomes are composed of: Topic: Ribosomes DNA and proteins RNA and lipids RNA and proteins DNA and lipids None 8. Which of the following factors can denature an enzyme? Topic: Enzyme Activity Low temperature Neutral pH High temperature Low substrate concentration None 9. Lysosomes are formed from which organelle? Topic: Lysosomes Endoplasmic reticulum Golgi apparatus Mitochondria Nucleus None 10. Aquaporins are specialized for the transport of: Topic: Membrane Transport Proteins Ions Glucose Water Amino acids None 11. Which type of cell junction forms a barrier to prevent the leakage of extracellular fluid? Topic: Cell Junctions Tight junctions Desmosomes Gap junctions Plasmodesmata None 12. Which molecule is the primary carrier of energy in cells? Topic: Cellular Metabolism NADH FADH2 ATP Glucose None 13. The process by which cells ingest external fluid, macromolecules, and large particles, including other cells, is called: Topic: Endocytosis Exocytosis Phagocytosis Pinocytosis Autophagy None 14. Which type of signalling involves the release of neurotransmitters at a synapse? Topic: Cell Signalling Endocrine signalling Paracrine signalling Autocrine signalling Synaptic signalling None 15. Cadherins are involved in: Topic: Cellular Adhesion Signal transduction Cell adhesion Metabolic pathways Genetic regulation None 1 out of 15 Time's up
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