Prepare for NEET Biology Molecular Basis of Inheritance with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert explanations of DNA replication and genetics.
Which of the following is NOT a reason why rRNA is the most abundant RNA in animal cells?
It is a structural component of ribosomes.
It is required for protein synthesis.
It carries the genetic code from DNA to the ribosome.
Multiple copies of rRNA genes exist in the genome.
A scientist isolates RNA from a eukaryotic cell. A significant portion of the isolated RNA is found to be associated with large protein complexes. Which type of RNA is this most likely to be?
mRNA
tRNA
rRNA
snRNA
During periods of active protein synthesis, which type of RNA experiences the highest increase in concentration within a cell?
mRNA
tRNA
rRNA
miRNA
In lac operon, when repressor protein binds to operator then
There is synthesis of -galactosidase enzyme
RNA polymerase cannot bind to the promoter
RNA polymerase binds to the promoter
There is mutation in i gene
In Lac operon, the product of โiโ gene binds to the operator
When bacterial cell has abundant amount of lactose
When bacterial cell has no lactose
RNA polymerase binds to the promoter
RNA polymerase synthesizes galactosidase continuously
Select the incorrect feature for the human genome project.
More than 50% of genome codes for proteins
Repeated sequences make up very large portion of human genome
Chromosome 1 has most genes
Human genome contains 3164.7 million nucleotide bases
What is true about RNA?
It binds with an amino acid at its. 3โ end
It has five double stranded regions
It has a codon at one end which recognises the anticodon on messenger RNA
It looks like clover leaf in the three dimensional structure
Which one of the following statements is incorrect about the properties of DNA?
DNA exists as a double helix.
The backbone of DNA is composed of sugar and phosphate.
Uracil is a base found in DNA.
Adenine pairs with thymine, and guanine pairs with cytosine.
