Microbiology and Immunology Quiz
Preview:
Which enzyme is responsible for synthesizing new DNA strands during replication?
A. Ligase
B. DNA polymerase
C. Primase
D. Helicase
What is the role of DNA ligase in DNA replication?
A. To add nucleotides
B. To synthesize RNA primers
C. To join Okazaki fragments
D. To unwind the DNA
Which of the following is a component of RNA but not DNA?
A. Cytosine
B. Thymine
C. Uracil
D. Adenine
Which of the following is a purine base?
A. Adenine
B. Uracil
C. Thymine
D. Cytosine
What is the primary function of messenger RNA (mRNA) in the cell?
A. To catalyze biochemical reactions
B. To store genetic information
C. To transport amino acids
D. To carry genetic information from DNA to ribosomes
What is the role of transfer RNA (tRNA) in protein synthesis?
A. To transcribe DNA into RNA
B. To bring amino acids to the ribosome
C. To form the ribosome structure
D. To splice introns from RNA
What type of bond connects the sugar and phosphate in nucleic acids?
A. Hydrogen bond
B. Phosphodiester bond
C. Ionic bond
D. Covalent bond
What is the basic unit of genetic information?
A. Nucleotide
B. Genome
C. Chromosome
D. Gene
What is the process of copying DNA called?
A. Mutation
B. Replication
C. Translation
D. Transcription
What is the primary function of tRNA in protein synthesis?
A. To carry amino acids to the ribosome
B. To splice introns from RNA
C. To form the ribosome structure
D. To synthesize mRNA
What is the function of DNA helicase during DNA replication?
A. To synthesize RNA primers
B. To unwind the DNA double helix
C. To join Okazaki fragments
D. To add nucleotides
What is the role of RNA polymerase during DNA replication?
A. To synthesize RNA primers
B. To break hydrogen bonds
C. To add nucleotides
D. To form the double helix
What is the function of the ribosome in protein synthesis?
A. To transcribe DNA
B. To translate mRNA
C. To replicate DNA
D. To splice RNA
Which molecule carries the genetic code from DNA to the ribosome?
A. mRNA
B. DNA
C. rRNA
D. tRNA
What enzyme is responsible for unwinding the DNA double helix during replication?
A. Primase
B. Polymerase
C. Ligase
D. Helicase
