In the DNA replication diagram, the enzyme joining Okazaki fragments is:
Correct answer: B. Ligase
- A. DNA polymerase I
- B. Ligase
- C. Primase
- D. Topoisomerase
Explanation
During lagging strand synthesis, short DNA segments (Okazaki fragments) are produced. DNA polymerase fills the gaps but leaves nicks between fragments. DNA ligase seals these nicks by forming phosphodiester bonds, joining fragments into one continuous strand.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
Practise Cell Structure and Function
2,478 free Cell Structure and Function MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Chromosomes questions
In the DNA replication diagram, Okazaki fragments are formed on:
In a labeled diagram of transcription, enzyme "X" synthesizing RNA is:
In a diagram showing transcription bubble, the DNA region actively being copied is:
In the labeled tRNA diagram, the region that binds to the codon on mRNA is:
In the tRNA diagram, the region where amino acid attaches is:
The chromosome with centromere near the end of chromatids is: