Muaj pes tsawg nucleotides nyob hauv DNA molecule?

Video: Muaj pes tsawg nucleotides nyob hauv DNA molecule?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

plaub nucleotides

Hauv qhov no, pes tsawg lub hauv paus khub nyob hauv DNA molecule?

Haploid human genome (23 chromosomes) kwv yees li ntawm 3.2 billion. hauv paus ntev thiab muaj 20, 000-25, 000 cov protein-coding genes. Ib kilobase (kb) yog ib chav ntsuas hauv molecular biology sib npaug li 1000 puag khub ntawm DNA los yog RNA.

Ib yam li ntawd, chav tsev tsawg tshaj plaws ntawm DNA hu ua dab tsi? nucleotide

Hauv qhov no, pes tsawg nucleotides nyob hauv chromosome?

Txhua chromosome muaj ib tug ntev heev, linear DNA molecule. Hauv cov neeg chromosomes tsawg tshaj plaws no DNA molecule yog tsim los ntawm 50 lab nucleotide khub; cov chromosomes loj tshaj plaws muaj qee yam 250 lab nucleotide khub.

DNA puas yog protein?

Tsis yog, DNA tsis yog a protein ntau . Qhov txawv yog lawv siv cov subunits sib txawv. DNA yog poly-nucleotide, protein ntau yog poly-peptide (peptide bonds txuas amino acids). DNA yog ib lub sijhawm ntev cov ntaub ntawv khaws cia, zoo li lub hard drive, thaum cov proteins yog cov tshuab molecular, zoo li neeg hlau caj npab.

Pom zoo:

Muaj pes tsawg atoms nyob rau hauv dej molecule?

peb atoms Hauv qhov no, pes tsawg oxygen atoms nyob rau hauv ib lub molecule ntawm dej? Cov tshuaj formula rau dej yog H 2 O uas txhais tau tias txhua molecule ntawm dej muaj 2 atom ua ntawm hydrogen (H) thiab ib atom ntawm oxygen (O).

Muaj pes tsawg guanine bases puas yog 50 lub hauv paus khub ob txoj hlua DNA 100 bases tag nrho muaj yog tias nws muaj 25 adenine bases?

Yog li, muaj tag nrho ntawm 25 + 25 = 50 adenine thiab thymine hauv tag nrho. Qhov ntawd tawm 100− 50 = 50 seem hauv paus. Nco ntsoov tias cytosine thiab guanine daim ntawv cog lus nrog ib leeg, thiab yog li lawv sib npaug ntawm cov nyiaj. Tam sim no peb tuaj yeem faib los ntawm 2 kom tau txais tus lej ntawm guanine lossis cytosine hauv paus