Bio Review Nov 7 DNA & Proteins

Front

What is the first phase of mitosis?

Back

Prophase

Front

What are the building blocks of DNA and RNA?

Back

Nucleotides

Front

What is the function of a centromere in a chromosome?

Back

The centromere is the region of a chromosome where the two sister chromatids are joined together and where the spindle fibers attach during cell division.

Front

What enzyme unwinds DNA during replication?

Back

Helicase

Front

What are the three-nucleotide sequences on mRNA called?

Back

Codons

Front

What is the role of helicase in DNA replication?

Back

Helicase unwinds the DNA double helix by breaking the hydrogen bonds between the base pairs.

Front

What is the significance of prophase in cell division?

Back

Prophase is the first stage of mitosis where chromatin condenses into visible chromosomes and the mitotic spindle begins to form.

Front

How do nucleotides link together to form DNA?

Back

Nucleotides are linked together by phosphodiester bonds between the phosphate group of one nucleotide and the sugar of another.

Front

What is the difference between DNA and RNA?

Back

DNA is double-stranded and contains deoxyribose sugar, while RNA is single-stranded and contains ribose sugar.

Front

What is the role of codons in protein synthesis?

Back

Codons specify the amino acids that will be added to a growing polypeptide chain during translation.