Gene & Protein Expression

Which of the following conditions suppress gene expression?

• Repressor binds to operator

• Inducer binds to repressor

• RNA polymerase complex binds to promoter

Which of the following is/are components of transcription-initiation complex in eukaryotes?

• lac operon

• RNA polymerase

• Transcription factors

When there is high level of NRD1, the transcription will be __________ regulated.

• positively

• negatively

• indifferently

Methylation of lysine residue in H3 histone may reduce gene expression.

• True

• False

What happens to the DNA if telomerase activity is reduced?

• DNA replication can occur infinitely

• More cell division can happen

• Cell may lose its replication ability

Genomic instability is caused by accumulated DNA damage

• True

• False

Disturbed balance between euchromatin and heterochromatin can lead to aging

• True

• False

Accumulation of misfolded proteins worsen aging process.

• True

• False

Which of the following is the ribosomal site for incoming aminoacyl-tRNA?

• A site

• P site

• E site

Translation will be initiated by the tRNA with anticodon of (read 5' to 3')

• ATG

• AUG

• UAG

• CAU