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CSIR NET Genes and Proteins — practice questions

Explore 62 free Genes and Proteins questions in CSIR NET Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Genes and Proteins questions and exercises with answers

Showing questions 1–30 of 62.

Get an mRNA ready to readRead the answer and worked solution →Run the ribosome in orderRead the answer and worked solution →Exon or intron?Read the answer and worked solution →Fill in the genetic codeRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Match the part to its jobRead the answer and worked solution →True or false, transcriptionRead the answer and worked solution →The Central Dogma of protein synthesis describes genetic information flowing in which order?Read the answer and worked solution →How many commonly occurring amino acids make up the protein alphabet?Read the answer and worked solution →A codon in mRNA is made up of how many consecutive nucleotides?Read the answer and worked solution →Nucleotide doublets were rejected as the coding unit because they allow only how many combinations?Read the answer and worked solution →How many of the 64 codons signal termination of protein synthesis?Read the answer and worked solution →Purified mRNA encoding horse globin could direct globin synthesis in a tulip cell. Which property of the genetic code does that show?Read the answer and worked solution →Reading an mRNA colinearly, nucleotides 4 to 6 of the coding sequence specify which amino acid of the protein?Read the answer and worked solution →How many nucleotides make up 12 mRNA codons?Read the answer and worked solution →In a prokaryotic cell, what is the central region in which the DNA resides called?Read the answer and worked solution →Which trait is commonly carried on bacterial plasmids?Read the answer and worked solution →Transcription requires the DNA double helix to unwind locally. What is that unwound region called?Read the answer and worked solution →What does it mean for a prokaryotic mRNA to be polycistronic?Read the answer and worked solution →How many protein subunits make up the core enzyme of prokaryotic RNA polymerase?Read the answer and worked solution →Which subunit of E. coli RNA polymerase makes transcription start at an appropriate site rather than a random one?Read the answer and worked solution →What is the consensus sequence of the -10 region of a prokaryotic promoter?Read the answer and worked solution →Which promoter element is recognized and bound by the sigma subunit?Read the answer and worked solution →Prokaryotic transcription initiation closes with the release of short RNA polymers of roughly what length?Read the answer and worked solution →At roughly what rate does prokaryotic elongation add nucleotides to a growing mRNA?Read the answer and worked solution →In rho-dependent termination, what makes the polymerase stall so that rho can catch up with it?Read the answer and worked solution →What stalls the polymerase during rho-independent termination?Read the answer and worked solution →Eukaryotic mRNAs are usually monogenic. What does that mean?Read the answer and worked solution →Which RNAs does RNA polymerase I synthesize?Read the answer and worked solution →Which class of transcripts does RNA polymerase II make?Read the answer and worked solution →

Worked practice questions

Get an mRNA ready to read

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Steps
  1. DNA is transcribed
  2. Pre mRNA is capped
  3. Poly A tail added
  4. Introns cut out
  5. mRNA exits nucleus
  6. Ribosome reads it
Instructions
Tap the steps in the order a message travels from gene to protein.
_Source: OpenStax Biology 1e, section 15.4 RNA Processing in Eukaryotes_

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Run the ribosome in order

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Steps
  1. Initiation complex
  2. tRNA enters A site
  3. Peptide bond forms
  4. tRNA moves to P
  5. tRNA exits at E
Instructions
Tap the steps of translation in the order the ribosome performs them.
_Source: OpenStax Biology 1e, section 15.5 Ribosomes and Protein Synthesis_

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Exon or intron?

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Left
Exon
Items
  1. Item
    Kept in the mRNA
    Answer
    Exon
  2. Item
    Codes for protein
    Answer
    Exon
  3. Item
    Spliced out
    Answer
    Intron
  4. Item
    Expressed
    Answer
    Exon
  5. Item
    Removed in nucleus
    Answer
    Intron
  6. Item
    Intervening piece
    Answer
    Intron
  7. Item
    Joined back up
    Answer
    Exon
  8. Item
    Degraded away
    Answer
    Intron
Right
Intron
Instructions
Swipe left for exon, swipe right for intron.
_Source: OpenStax Biology 1e, section 15.4 RNA Processing in Eukaryotes_

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