During DNA replication, the lagging strand is synthesized discontinuously. Which enzyme is PRIMARILY responsible for joining these discontinuous fragments?
DNA Polymerase I
DNA Polymerase III
DNA Helicase
DNA Ligase
Related Questions
The bond linking the sugar and base in a nucleoside is:
Phosphodiester bond
Hydrogen bond
Peptide bond
N-glycosidic bond
A researcher isolates a nucleic acid sample and finds it contains 22% adenine. Which of the following is the MOST LIKELY composition of the sample?
22% thymine, 28% guanine, 28% cytosine
28% thymine, 22% guanine, 22% cytosine
22% uracil, 28% guanine, 28% cytosine
Equal amounts of all four bases
What type of bond links nucleotides together in a nucleic acid strand?
Peptide bond
Glycosidic bond
Hydrogen bond
Phosphodiester bond
If the total amount of adenine and thymine in a double-stranded DNA is 60%, then the amount of guanine in this DNA will be
15%
20%
30%
40%
Answer briefly
I. Which colour glycogen gives on its reaction with iodine solution?
II. What is satellite DNA?
III. Name three components of a nucleotide molecule
Correct option will all answers is
I. Reddish-brown
II. Highly repetitive DNA sequence
III. Nitrogenous base, pentose sugar, phosphate group
I. Blue-black
II. Non-repetitive DNA sequence
III. Amino acid, hexose sugar, phosphate group
I. Violet
II. Moderately repetitive DNA sequence
III. Nitrogenous base, pentose sugar, sulfate group
I. Green
II. Unique DNA sequence
III. Amino acid, deoxyribose sugar, phosphate group
Which of the following describes the flow of genetic information according to the central dogma?
RNA to DNA to Protein
Protein to RNA to DNA
DNA to Protein to RNA
DNA to RNA to Protein
A novel virus is discovered with a single-stranded nucleic acid genome. Treatment with RNase H significantly reduces its infectivity, while DNase I has no effect. Further analysis reveals the presence of short RNA fragments complementary to the genome. What can be most confidently inferred about the viral genome?
It is a single-stranded RNA virus that replicates through a DNA intermediate.
It is a single-stranded DNA virus that replicates through an RNA intermediate.
It is a single-stranded RNA virus that replicates through a double-stranded RNA intermediate.
It is a double-stranded RNA virus.
Which of the following statements are true?
I. Genetic RNA occurs in certain viruses called ribovirus
II. RNA of riboviruses may be single stranded
III. Double stranded RNA may also be present in riboviruses
All are correct
Only I
All are incorrect
Only II
A mutation in a tRNA molecule alters its anticodon sequence from 3'-AUC-5' to 3'-AUA-5'. Assuming the wobble hypothesis applies, which of the following changes in protein synthesis is MOST likely to occur?
Protein synthesis will be terminated prematurely.
A different amino acid will be incorporated at the corresponding codon.
The mutant tRNA might recognize a different codon but still incorporate the same amino acid.
The mutation will have no effect on protein synthesis.
Answer briefly
I. Which colour glycogen gives on its reaction with iodine solution?
II. What is satellite DNA?
III. Name three components of a nucleotide molecule
Correct option will all answers is
Reddish-brown; Highly repetitive DNA; Nitrogenous base, pentose sugar, phosphate group
Blue-black; Non-repetitive DNA; Amino acid, hexose sugar, phosphate group
Yellow; Moderately repetitive DNA; Nitrogenous base, triose sugar, sulphate group
Violet; Unique DNA; Amino acid, pentose sugar, phosphate group
