SZABMU AHS 2026 Cell Biology Free Quiz 8

71. Which cytoskeletal elements does myosin interact with?

A. Myosin moves on microtubules B. Myosin is a microtubule motor C. Myosin moves on actin filaments D. Myosin is not a motor protein

72. During which meiotic phase does crossing over occur?

A. Prophase II B. Metaphase I C. Anaphase I D. Prophase I

73. What structure facilitates pairing and recombination of homologs in meiosis?

A. Synaptonemal complex B. Chiasma C. Recombination nodule D. Spindle fibers

74. Which proteins are the key regulators of the eukaryotic cell cycle?

A. Growth factors only B. Cyclins and CDKs C. Ras and Raf D. p53 only

75. Which checkpoint monitors DNA damage before replication?

A. G2/M checkpoint B. M checkpoint C. G1/S checkpoint D. S checkpoint

76. What structures cap chromosome ends and prevent loss of genetic material?

A. Centromeres B. Origins of replication C. Telomeres D. Satellite DNA

77. Which chromosomal region is essential for spindle attachment?

A. Centromeres B. Telomeres C. Origins of replication D. Nucleolar organizer

78. What is the role of APC/C in mitosis?

A. Sister chromatid cohesion B. Ubiquitination of securin and cyclin B C. DNA replication D. Cytokinesis

79. Which enzymes are the main executioners of apoptosis?

A. Serine proteases B. Metalloproteases C. Caspases D. Lysosomal enzymes

80. Which ciliary type acts as a cellular antenna for signal transduction?

A. Flagella B. Cilia (motile) C. Primary cilium (non-motile) D. Microvilli