DNA Replication

Front

What is a nucleotide?

Back

A nucleotide is the basic building block of DNA and RNA, consisting of a nitrogenous base, a sugar molecule, and a phosphate group.

Front

What is the role of DNA helicase in DNA replication?

Back

DNA helicase is an enzyme that unwinds and unzips the double-stranded DNA, allowing the replication process to occur.

Front

What are histones?

Back

Histones are proteins that help package and organize DNA into structural units called nucleosomes, playing a crucial role in gene regulation.

Front

What is the accepted model of DNA replication?

Back

The accepted model of DNA replication is the semi-conservative model, where each new DNA molecule consists of one original strand and one newly synthesized strand.

Front

List the components of a nucleotide.

Back

A nucleotide consists of a nitrogenous base (adenine, thymine, cytosine, or guanine), a deoxyribose sugar, and a phosphate group.

Front

What is the difference between DNA and RNA?

Back

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

Front

What is the function of DNA polymerase?

Back

DNA polymerase is an enzyme that synthesizes new DNA strands by adding nucleotides complementary to the template strand during replication.

Front

What is a gene?

Back

A gene is a segment of DNA that contains the instructions for making a specific protein or set of proteins.

Front

What is the structure of DNA?

Back

DNA has a double helix structure, consisting of two strands of nucleotides twisted around each other, held together by hydrogen bonds between complementary bases.

Front

What is the significance of the 5' and 3' ends of DNA?

Back

The 5' and 3' ends refer to the directionality of the DNA strands, which is crucial for the processes of replication and transcription.