1 Which of the following is a significant role of mitosis in multicellular organisms? A Production of gametes B Genetic diversity C Growth and repair of tissues D Reduction of chromosome number
2 The large central vacuole in plant cells helps to maintain: A Turgor pressure B Protein synthesis C Cell division D DNA replication
3 Which phase of the cell cycle is the longest and includes G1, S, and G2? A Interphase B Mitotic phase C Cytokinesis D Karyokinesis
4 In which stage of mitosis do chromosomes align at the metaphase plate? A Prophase B Metaphase C Anaphase D Telophase
5 Which organelle contains digestive enzymes to break down waste? A Lysosome B Ribosome C Golgi apparatus D Mitochondrion
6 What is the result of non-disjunction during meiosis? A Normal gametes B Gametes with an abnormal number of chromosomes C Increased genetic diversity D Cancer development
7 The site of photosynthesis in plant cells is the: A Mitochondrion B Chloroplast C Ribosome D Nucleus
8 Which phase of mitosis involves the separation of sister chromatids and their movement to opposite poles? A Prophase B Metaphase C Anaphase D Telophase
9 Which organelle is responsible for modifying, sorting, and packaging proteins? A Endoplasmic reticulum B Golgi apparatus C Lysosome D Vacuole
10 Which of the following is a characteristic of cancer cells? A Controlled cell division B Metastasis C Normal cell cycle checkpoints D Limited growth
11 What forms during cytokinesis in plant cells? A Cleavage furrow B Cell plate C Spindle fibers D Contractile ring
12 Which structure forms during cytokinesis in plant cells? A Cleavage furrow B Cell plate C Spindle fiber D Centriole
14 What is the main function of the cell wall in plant cells? A To control cell activities B To provide rigidity and support C To synthesize proteins D To store water
15 Which of the following is a specialized animal cell? A Mesophyll cell B Guard cell C Neuron D Root hair cell
16 During which phase of meiosis do homologous chromosomes separate? A Anaphase I B Anaphase II C Metaphase I D Telophase I
17 What is a benign tumor? A A tumor that spreads to other parts of the body B A tumor that remains confined to its original location C A tumor that is always cancerous D A tumor that results from meiosis errors
18 Which of the following is a benign tumor? A A tumor that invades nearby tissues B A tumor that spreads to distant sites C A tumor that remains localized D A tumor that is always cancerous
19 Which of the following is a key difference between mitosis and meiosis? A Mitosis produces haploid cells, meiosis produces diploid cells B Mitosis involves one division, meiosis involves two divisions C Mitosis occurs only in germline cells, meiosis occurs in somatic cells D Mitosis results in genetic diversity, meiosis does not
20 Which cytoskeletal element is the thinnest? A Microtubules B Microfilaments C Intermediate filaments D Cilia
21 Which structure controls what enters and leaves the cell? A Cell wall B Cell membrane C Cytoplasm D Nucleus
22 Which of the following is a temporary exit from the cell cycle? A G0 phase B S phase C G2 phase D Prophase
23 Which of the following is present in prokaryotic cells? A Nucleus B Mitochondria C Cell wall D Golgi apparatus
24 Which of these is found in plant cells but not in animal cells? A Mitochondrion B Ribosome C Chloroplast D Nucleus