Gene Regulation
Biology ⇒ Genetics and Heredity
Gene Regulation starts at 11 and continues till grade 12.
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See sample questions for grade 12
A mutation in the promoter region of a gene reduces the binding of RNA polymerase. What is the likely effect on gene expression?
A scientist observes that a gene is highly expressed in liver cells but not in muscle cells. What is the most likely explanation?
Describe how gene regulation is important during embryonic development.
Describe the difference between constitutive and regulated gene expression.
Describe the difference between positive and negative gene regulation.
Describe the role of transcription factors in gene regulation.
A mutation in the promoter region of a gene reduces the binding of RNA polymerase. What is the likely effect on gene expression?
A scientist observes that a gene is highly expressed in liver cells but not in muscle cells. What is the most likely explanation?
Which molecule acts as a repressor in the trp operon of E. coli? (1) Tryptophan (2) Lactose (3) Glucose (4) RNA polymerase
Which of the following best describes gene regulation? (1) The process by which genes are turned on or off (2) The process of DNA replication (3) The process of protein degradation (4) The process of cell division
Which of the following is a characteristic of inducible operons? (1) They are always active (2) They are turned on in response to a specific substrate (3) They are only found in eukaryotes (4) They are regulated by activators only
Which of the following is a direct result of DNA methylation? (1) Increased gene expression (2) Decreased gene expression (3) Increased mutation rate (4) Enhanced translation
Fill in the blank: A DNA sequence that represses the expression of a gene is called a(n) ________.
Fill in the blank: In eukaryotes, the addition of a methyl group to cytosine bases in DNA is called ________.
Fill in the blank: The process by which a cell becomes specialized in structure and function is called ________.
Fill in the blank: The process by which a cell controls which genes, out of the many genes in its genome, are expressed is called ________.
True or False: All cells in a multicellular organism have the same DNA, but different genes may be expressed in different cell types.
True or False: All genes in a cell are expressed at the same time.
True or False: All regulatory elements are located immediately upstream of the gene they control.
True or False: Enhancers are DNA sequences that can increase the transcription of genes, even if they are located far from the gene they regulate.
