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Molecular Basis of Inheritance — NEET UG Biology PYQs

54 previous year questions from Molecular Basis of Inheritance with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

54 questionsBiologySolutions on every page
1

A 340 Å long segment of DNA molecule has 40 thymine nitrogenous bases, what will be the number of guanine bases in the same segment?

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The enzyme / proteins that prevent/s recoiling of the separated strands of DNA during replication is __________.

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Given below are two statements: Statement I - Avery, Mc Carty and Mac Leod first evidenced to prove the DNA is a genetic material. Statement II - Hershey and Chase used Streptococc

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Formation of peptide bond between amino acids during translocation is catalyzed by __________.

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In lac operon, which of the following acts as inducer and bind to repressor?

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Wobble hypothesis is useful to explain the __________ property of genetic code.

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Part of gene that is transcribed but NOT translated is __________.

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Match the gene in Column I with its role in Column II. Column I (Gene) Column II (Role of gene) (A) Structural gene (I) Binding site for repressor (B) Operator gene (II) Codes for

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Two different amino acids will never be encoded by the same codon, which property of genetic code does this represent?

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During replication of DNA, formation of new strand takes place ____________.

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The two strands in a DNA molecule are ________ .

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Wobble hypothesis explains which one of the following properties of genetic code?

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In their experiment to prove DNA replication is semi-conservative, Meselson and Stahl used 6M CsCl because the density gradient value of 6M CsCl is ________ the density gradient va

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During DNA replication, Okazaki fragments are used to elongate _________.

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The transforming principle in Griffith's experiment was detected _______.

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Match the terms in List I with their correct descriptions in List II and choose the correct option. List I List II (A) Splicing (I) Polyadenylation. (B) Capping (II) Express sequen

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Which of the following step in DNA fingerprinting involves the movement of negatively charged DNA fragments to the positive pole?

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Given below are two statements: Statement (I): The Human genome Project aims at transfering the related technologies to the private sectors, such as industries. Statement (II): The

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What is the role of the DHU arm of a tRNA molecule?

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The nucleotide sequence of anticodon is complementary to nucleotide sequence present on________.

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During replication the enzyme that forms double helix to form daughter DNA molecule is ___________.

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If the number of adenine nitrogenous base in a given DNA segment is 25 and the number of guanine is 45, What would be the total number of nucleotides in that segment?

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Given below are two statements: Statement I - The unit of DNA, in which replication occur is called replicon. Statement II - In eukaryotes, there is only one replicon whereas in pr

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In protein synthesis, during elongation of a polypeptide chain, the charged tRNA carrying the aminoacid is received at ___ site and uncharged tRNA is released from ___ site of the

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The repressor protein in lac operon is produced by the action of ________.

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Along with Histone like DNA binding proteins which enzyme maintains supercoiled state in packaging of DNA in prokaryotes?

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Given below are two statements. Statement I - RNA acts as biocatalyst and catalytic RNA is ribozyme. Statement II - Due to repeated replication and mutation, varieties of RNA molec

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During replication of DNA, each separated parent DNA strand acts as ___________.

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Identify the correct features of the genetic code. i. It is a triplet code. ii. It shows distinct polarity. iii. It is overlapping. iv. The genetic code was deciphered by Watson an

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Given below are two statements about DNA fingerprinting. Statement (I): The DNA probe used in DNA fingerprinting is a dsDNA obtained from organisms only. Statement (II): The DNA pr

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In DNA, 20-100 base pairs which vary in every human being form ___________.

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Meselson and Stahl proved the semi-conservative nature of DNA replication using the isotope ___.

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In the chromosomes, DNA is associated with histone and non-histone proteins. This was reported in 1974 by -----------------.

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Select the INCORRECT statement with respect to coding strand.

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Select the INCORRECT statement from the following related to HGP.

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In Homo sapiens , the estimated gene number is ________.

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Which one of the following experiments by Griffith with Streptococcus pneumoniae , resulted in the death of mice due to pneumonia?

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Given below are two statements regarding Lac operon. Statement (I): In Lac operon, in the absence of lactose, repressor protein binds to the operator gene and represses the process

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Which one of the following is INCORRECT about DNA fingerprinting?

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Match List I with List II List I (Binding site of ribosome) List II (Substances associated) (A). P-site (I). Amino-acetyl tRNA (B). A-site (II). Peptidyl tRNA (C). E-site (III). Ex

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A promoter in a transcription unit is a DNA sequence ________.

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In lactose operon of E. coli , what is the function of promoter?

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In eukaryotes, the regulation of gene expressions can be at different levels EXCEPT:

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Autoradiography in DNA fingerprinting is used to--

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In a DNA strand, the nucleotides are linked together by-----------.

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Hershey-Chase performed an experiment on------------------.

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The enzyme that facilitates local unwinding of DNA duplex during transcription is-------------------.

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Match List I with List II List I (Enzymes involved in DNA replication) List II (Function.) (A) Helicase (I) Forms double helix to form daughter DNA molecules. (B) DNA polymerase (I

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Given below are two statements: Statement (I): DNA fingerprinting technique involves identifying similarities in VNTRs. Statement (II): The length of the regions having VNTRs is di

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Which one of the following is NOT the main aim of Human Genome Project ?

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As in rDNA technology, in DNA fingerprinting, also, all the following techniques are used EXCEPT:

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Identify the correct order of the following enzymes used during the process of replication of eukaryotic DNA. (A). DNA polymerase (B). DNA ligase (C). DNA helicase (D). DNA gyrase

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The DNA probe used in DNA fingerprinting consists of ____(A)____ and labeled with ____(B)____. Choose the correct options for (A) and (B) respectively.

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E. coli cells infected with bacteriophages having radioactive phosphorus are grown on medium containing normal phosphorus and sulphur and their daughter cells are centrifuged. What

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