DNA Structure and Function

Front

What are the three components of a DNA nucleotide?

Back

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

Front

What is the role of nitrogen bases in DNA?

Back

Nitrogen bases pair with each other (adenine with thymine, and cytosine with guanine) to form the rungs of the DNA ladder, contributing to genetic variation and coding for proteins.

Front

What is the difference between ribose and deoxyribose?

Back

Ribose is a sugar found in RNA, while deoxyribose is a sugar found in DNA. Deoxyribose lacks one oxygen atom compared to ribose.

Front

What is the significance of the sequence of nitrogen bases in DNA?

Back

The sequence of nitrogen bases determines the genetic information carried by the DNA, influencing traits and functions in an organism.

Front

How are DNA and RNA different in terms of structure?

Back

DNA is double-stranded and contains deoxyribose sugar and thymine, while RNA is single-stranded and contains ribose sugar and uracil instead of thymine.

Front

What is a gene?

Back

A gene is a segment of DNA that contains the instructions for making a specific protein, which in turn influences a particular trait.

Front

What is the function of DNA polymerase?

Back

DNA polymerase is an enzyme that synthesizes new DNA strands by adding nucleotides to a growing chain during DNA replication.

Front

What is the structure of DNA?

Back

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

Front

What is the role of the phosphate group in a DNA nucleotide?

Back

The phosphate group links the sugar of one nucleotide to the sugar of another, forming the backbone of the DNA strand.

Front

What is the process of DNA replication?

Back

DNA replication is the process by which a cell makes an identical copy of its DNA before cell division, ensuring that each new cell receives a complete set of genetic information.