List three structural characteristics of DNA.

검증된 단계별 안내

DNA (Deoxyribonucleic Acid) is a double-stranded molecule, meaning it consists of two complementary strands that are coiled around each other to form a double helix structure.

The backbone of each DNA strand is composed of alternating sugar (deoxyribose) and phosphate groups, which are connected by phosphodiester bonds.

The interior of the DNA double helix contains nitrogenous bases (adenine, thymine, cytosine, and guanine) that pair specifically through hydrogen bonding: adenine pairs with thymine (A-T) and cytosine pairs with guanine (C-G).

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

도움이 되었나요?

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Double Helix Structure

DNA is structured as a double helix, which consists of two long strands of nucleotides twisted around each other. This configuration provides stability and allows for the efficient storage of genetic information. The strands are held together by hydrogen bonds between complementary base pairs, which are adenine-thymine and guanine-cytosine.

Antiparallel Strands

The two strands of DNA run in opposite directions, a feature known as antiparallel orientation. One strand runs from the 5' to 3' direction, while the other runs from 3' to 5'. This orientation is crucial for DNA replication and transcription, as enzymes that synthesize new strands can only add nucleotides to the 3' end.

Base Pairing

Base pairing refers to the specific hydrogen bonding between the nitrogenous bases of the two DNA strands. Adenine pairs with thymine (A-T) and guanine pairs with cytosine (G-C). This complementary base pairing is essential for the accurate replication of DNA and the transmission of genetic information during cell division.