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WorksheetsPHYSIOLOGY GENETICS QUIZ
Total questions: 10
Worksheet time: 5mins
Which statements about micro-RNA’s (miRNA) is correct ?
miRNAs are formed in the cytoplasm and repress translation or promote degradation of messenger RNA (mRNA) before it can be translated
miRNAs are formed in the nucleus and then processed in the cytoplasm by the dicer enzyme
miRNAs are short (21 to 23 nucleotide) double stranded RNA fragments that regulate gene expression
miRNAs repress gene transcription
Which of the following does not play direct role in the process of transcription ?
Helicase
RNA Polymerase
Chain terminating sequence
Activated RNA molecules
Promoter sequence
Which statement about mRNA is correct ?
mRNA carries the genetic code to the cytoplasm
mRNA carries activated amino acids to the ribosomes
mRNA is composed of single stranded RNA molecule of 21 to 23 nucleotides that can regulate gene transcription
mRNA forms ribosomes
‘Redundancy’ or ‘degeneration’ of the genetic code occurs during which step of protein synthesis ?
Dna replication
Transcription
Post-transcriptional modification
Translation
Protein glycosylation
What controls the sequence of amino acids in protein molecule ?
Genetic code
Nucleotide
Code word
Hydrogen bond
The stop code for the protein synthesis is :-
AUG
AUU
UAG
UUT
The enzyme which builds a mRNA strand complementary to the DNA transcription unit is called
Dna polymerase
RNA Polymerase
Helicase
Dna ligase
What are the repeating units of nucleic acids. ?
Phosphate molecule
Nucleotides
Bases
Sugar molecules
Which of the following is not needed for DNA transcription?
Ribosomes
Nucleotides
DNA
Enzymes
Where is Ribosomal RNA processed in the nucleus ?
Nuclear envelop
Dna
Nucleolus
Nucleotide
