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1.
What prevents the reannealing of DNA strands during replication?
1. Helicase
2. Topoisomerase
3. Single-stranded binding proteins (SSBPs)
4. Ligase
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2.
What prevents actin and myosin from interacting in a relaxed muscle fiber?
1. Low ATP levels
2. Presence of calcium ions
3. Troponin-tropomyosin complex
4. Absence of myosin
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3.
What prevents polyspermy in humans after fertilization?
1. Zona pellucida hardening
2. Release of cortical granules
3. Acrosome reaction
4. Increased estrogen levels
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4.
What prevents the self-pollination in plants with herkogamy?
1. Temporal separation of pollen release and stigma receptivity
2. Physical barrier between anther and stigma
3. Genetic incompatibility
4. Pollination by insects only
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What prevents the reannealing of DNA strands during replication?