Unit 2 Review

Which phase of the cell cycle is characterized by the cell growing and preparing for DNA replication?

• G1 phase

• S phase

• G2 phase

• M phase

During which phase of mitosis do the chromosomes align in the middle?

• Prophase

• Metaphase

• Anaphase

• Telophase

What is the main difference between mitosis and meiosis?

• Mitosis results in two cells, while meiosis results in one cell.

• Mitosis occurs in gametes cells, while meiosis occurs in somatic cells.

• Mitosis involves one cell division, while meiosis involves two.

• Mitosis replicates DNA once, while meiosis does not replicate DNA.

Which of the following lists the enzymes involved in DNA replication in the correct ORDER?

• ligase (glue), helicase (unzip), dna polymerase (add nucleotides)

• dna polymerase (add nucleotides), helicase (unzip), ligase (glue)

• helicase (unzip), dna polymerase (add nucleotides), ligase (glue)

• helicase (unzip), ligase (glue), dna polymerase (add nucleotides)

In which phase of meiosis do homologous chromosomes separate?

• Prophase I

• Metaphase I

• Anaphase I

• Anaphase II

What is the role of DNA polymerase in DNA replication?

• Unwinding the DNA helix

• Adding nucleotides to the growing DNA strand

• Cutting the DNA into fragments

• Rejoining the separated DNA strands

Which of the following biotechnologies involves the modification of an organism's genetic material?

• Fermentation

• Genetic engineering

• Tissue culture

• Chromatography

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

• G1 phase

• S phase

• G2 phase

• M phase

What is the significance of the G2 phase in the cell cycle?

• Cell growth and preparation for DNA replication

• DNA replication

• Preparation for mitosis

• Division of the cytoplasm

Which process ensures genetic diversity in sexually reproducing organisms?

• Mitosis

• Meiosis

• DNA replication

• Transcription