Practice free Molecular Basis of Inheritance (Botany) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
A DNA nucletotide chain has AG C T T C GA sequence The nucleotide sequence of other chain would be (AFMC - 1993)
A DNA nucleotide chain has complementary base pairing: Adenine (A) pairs with Thymine (T), and Cytosine (C) pairs with Guanine (G). Given the sequence AGCTTCGA, the complementary sequence would be TCGAACT, corresponding to option o1.
A functional unit in synthesis of protein is
Polysomes, also known as polyribosomes, are a cluster of ribosomes bound to an mRNA molecule, playing a key role in the synthesis of proteins. They facilitate the translation of mRNA into proteins by enabling multiple ribosomes to read a single mRNA strand simultaneously.
VNTR is employed for (AMU - 2002)
Variable number tandem repeats (VNTR), also called mini-satellites, are among the families of repetitive DNA dispersed in the genome. ... The method, called DNA fingerprinting, is used to identify a particular person in forensic cases, or to establish parenthood.
Out of 64 codons 61 code for 20 types of aminoacids It is due to (CBSE - 2002)
The degeneracy of the genetic code refers to the fact that multiple codons can encode the same amino acid. This is why 61 codons can specify only 20 amino acids. It provides a level of redundancy, which helps to buffer against mutations in the DNA sequence.
Okazaki fragments are joined by enzyme (Kerala 2005)
DNA ligase is the enzyme responsible for joining Okazaki fragments during DNA replication. It catalyzes the formation of a phosphodiester bond between the 3' end of one fragment and the 5' end of another, thus creating a continuous DNA strand.
Heat killed pathogenic cells and live non pathogenic cells are mixed and injected into Mice The result would be (Kerala - 2001)
The experiment you're referring to is similar to the famous Griffith's experiment with Streptococcus pneumoniae. When heat-killed pathogenic (virulent) bacteria and live non-pathogenic (non-virulent) bacteria are injected into mice, the mice develop the disease and die. This is because the non-pathogenic bacteria take up genetic material from the heat-killed pathogenic bacteria, transforming into a virulent form and causing disease.
The equivalent of a structural gene is
Cistron is the segment of DNA which determines the synthesis of complete polypeptide. Thus, it is considered as equiaveltn to a structural gene. Therefore, option is correct and others are incorrect.
Concept Enhancer - Eukaryotic structural gene is monocistronic whereas prokaryotic structural gene is polycistronic.
Muton - Smallest unit of DNA in which mutation occurs.
Operon - Functional unit of genomic DNA containing a cluster of genes under condtrol of single promoter.
Recon - Smallest unit of DNA for recombination.
DNA-dependent RNA polymerase catalyses transcription on one strand of the DNA which is called the
DNA dependent RNA polymerase catalyses transcription on one strand of the DNA called a template strand.
A template can be considered as one of those strands of DNA which decodes its information directly through RNA polymerase.
This information is then restored within the RNA molecule and transferred outside the nucleus for protein synthesis within the cytoplasm.
Which of the following is not required for any of the techniques of DNA fingerprinting available at present ?
A zinc finger is a small protein structural motif that is characterised by the co-ordination of one or more Zn ions in order to stabilise the folds.
Removal of RNA polymerase III from nucleoplasm will affect the synthesis of
RNA polymerase III transcribes tRNA, RNA poly II synthesis mRNA while RNA poly I synthesis rRNA in eukaryotes.
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