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Question
An operon is a ______.
Options
Protein that suppresses gene expression.
Protein that accelerates gene expression.
Cluster of structural genes with related function.
Gene that switches other genes on or off
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Solution
An operon is a cluster of structural genes with related functions.
Explanation:
An operon is a functional unit of DNA that contains a cluster of genes that are transcribed together into a single mRNA strand. This arrangement allows the cell to regulate a set of proteins with related metabolic functions, such as the enzymes needed to break down lactose, simultaneously. It typically consists of a promoter, an operator, and the structural genes themselves.
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RELATED QUESTIONS
Which one of the following is a stop codon?
(a) UAG
(b) UAC
(c) AUG
(d) UCA
Briefly describe the following:
Translation
Ribosomes are composed of two subunits; the smaller subunit of a ribosome has a binding site for _________ and the larger subunit has two binding sites for two __________.
The process of translation is ______.
The translation termination triplet is ______.
The three codons which result in the termination of polypeptide chain synthesis are ______.
During translation, activated amino acids get linked to tRNA. This process is commonly called as ______.
Which cellular process is shown below?
Which of the following are correct statements for a tRNA molecule?
- It is an adapter molecule.
- Previously called sRNA (soluble RNA)
- tRNA has a codon loop that has bases complementary to the code,
- it also has an amino acid accepter end to which it binds to amino acids.
- It is non-specific for each amino acid.
Where are the untranslated regions located on mRNA and why?
