23 Questions
What is the characteristic of B DNA?
Right-handed helix with 10 residues per turn
What is the number of hydrogen bonds between Adenine and Thymine?
2
What is the shape of Z DNA?
Left-handed helix
What is the genetic code responsible for?
Specifying the sequence of amino acids in proteins
What is the purpose of the codons in the genetic code?
To specify the sequence of amino acids
What is the function of a typical protein?
Participating in metabolic processes
What is the total number of codons in the genetic code?
64
What is the function of the enzyme primase in DNA replication?
To start DNA replication by synthesizing RNA primers
What is the characteristic of the genetic code that ensures that a specific codon always codes for the same amino acid?
Unambiguous
During DNA replication, what is the direction of synthesis of new DNA strands?
5' to 3'
What is the result of DNA replication?
Two identical double-stranded DNA
What is the function of the origin recognition complex (ORC) in DNA replication?
To recognize the origin of replication
What is the primary function of topoisomerases during DNA replication?
To relieve torsional strain that results from helicase-induced unwinding
Which enzyme is responsible for removing mismatched nucleotides during DNA replication?
DNA polymerase III
What is the direction of synthesis of the leading strand in DNA replication?
5' to 3'
Which enzyme is responsible for synthesizing short segments of complementary RNA primers during DNA replication?
Primase
What is the characteristic of the lagging strand in DNA replication?
It is synthesized in short, discontinuous segments
What is the function of DNA ligase in the replication process?
To seal the nick by catalyzing the formation of a phosphodiester bond
Which of the following RNA polymerases is responsible for synthesizing tRNA?
Pol III
What is the function of enhancers in the transcription process?
To stimulate transcription rate
What is the function of introns in the post-transcriptional modification process?
To be removed and spliced out of the RNA transcript
What is the function of tRNA in the translation process?
To carry amino acids to the growing polypeptide chain
What is the sequence of the translated protein in the given example?
NH2 - Met - Tyr - Stop - His - COOH
This quiz covers the structure of DNA, including the different forms of DNA helices, and Chargaff's rule of base pairing. It's a crucial concept in molecular genetics.
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