Cell Cycle and DNA Replication Quiz

During which phase of the cell cycle does DNA replication occur?

• G1 phase

• G2 phase

• S phase

• M phase

What enzyme is responsible for unwinding the DNA double helix during replication?

• DNA polymerase

• DNA helicase

• DNA ligase

• RNA primase

What does the 'S' in S phase stand for?

• Separation

• Synthesis

• Splitting

• Sequencing

Which of the following base pairings is correct for DNA?

• Adenine - Guanine

• Thymine - Cytosine

• Adenine - Thymine

• Guanine - Thymine

What is the main purpose of DNA replication?

• To create RNA

• To produce proteins

• To make identical copies of DNA for cell division

• To repair damaged DNA

What is the correct definition of biological evolution?

• Changes in an individual organism during its lifetime

• The development of more complex features in a product

• The change in a population's inherited traits over generations

• The transformation of one species into a completely different species

Which of the following is NOT a mechanism of evolution mentioned in the video?

• Natural selection

• Genetic drift

• Gene flow

• Artificial selection

In biological terms, what does 'fitness' refer to?

• How physically strong an organism is

• How well an organism can adapt to its environment

• How many offspring an organism produces

• How long an organism can survive

Which of the following best describes gene flow?

• Random changes in DNA

• Movement of genes between populations through migration

• Survival of the fittest individuals

• Changes in gene frequency due to chance events

In the grasshopper example, what trait might be selected for through natural selection?

• Longer antennae

• Faster jumping ability

• Green coloration for camouflage