Molecular Basis of Inheritance MCQs for NEET :
Molecular Basis of Inheritance is important for class 12 students appearing for CBSE board exam as well as NEET Aspirants also. Below we are provided MCQ on Molecular Basis of Inheritance Prepared by subject experts and students can refer these Molecular Basis of Inheritance NEET MCQ Questions for their NEET exam preparation. Below MCQ questions and answer are prepare for class 12 and NEET students. These fully solved MCQ questions are applicable to all college students, freshers or experienced as well as various tests & contests in colleges. NEET Aspirants can enhance their knowledge by regular practice which will help them crack any exam exam. These MCQs provided here help students to understand each Concept of the chapter in the easy and interesting way. Students can practice these MCQ thoroughly in order to score maximum marks in the NEET exam.
MCQ on Molecular Basis of Inheritance NEET Questions :
1. Select the correct match :
(a) Mathew MeselsOn and F. Stahl-Pisum sativum
(b) Alfred Hershey and Martha Chase – TMV
(c) Alec Jeffreys – Streptococcus pneumnine
(d) Francois Jacob and Jacques Monod – Lac Operon
Answer: D
2. All of the following are part of an operon except______
(a) structural genes
(b) a promoter
(c) an enchancer
(d) an operator
Answer: C
3. AGGTATCGCAT is sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?
(a) ACCUAUGCCU
(b) AGGUAUCGU
(c) UGTUTCGCAT
(d) UCCAUAGCGUA
Answer: D
Read : MCQ on Principle of Inheritance and Variation
4. Spliceosomes are not found in cells of____________
(a) Plants
(b) Animals
(c) Fungi
(d) Bacteria
Answer: D
5. If there are 999 bases in an RNA that codes for a protein with 33 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?
(a) 11
(b) 333
(c) 1
(d) 33
Answer: D
6. Which of the following is not required for any of the techniques of DNA fingerprinting available at present?
(a) DNA – DNA hybridization
(b) Polymerase chain reaction
(c) Zinc finger analysis
(d) Restriction enzymes
Answer: C
7. Satellite DNA is important because it_________
(a) Codes for enzymes needed for DNA replication
(b) Codes for proteins needed in cell cycle.
(c) Shows high degree of polymorphism in population and also the same degree of polymorphism in an individual which is
heritable from parents to children.
(d) Does not code for proteins and is same in all members of the population.
Answer: C
Read : MCQ on Sexual Reproduction in Flowering Plants
8. The experimental proot for semi-conservative replication of DNA was first shown in a________
(a) Plant
(b) Fungus
(c) Bacterium
(d) Virus
Answer: C
9. During DNA replication, Okazaki fragments arevused to elongate________
(a) The leading strand towards replication fork
(b) The lagging strand towards replicaton fork
(c) The leading strand away from replication fork
(d) The lagging strand away from the replication fork
Answer: D
10. Which of the following RNAs should be most aboundant in animal cell?
(a) r-RNA
(b) m-RNA
(c) t-RNA
(d) mi-RNA
Answer: A
Also Read : Reproductive Health MCQ for NEET
11. The final proof for DNA as the genetic material came from the experiments of________
(a) Griffith
(b) Hershey and Chase
(c) Avery, Mcleod and McCarty
(d) Hargobind Khorana
Answer: B
12. The association of histone H1 with a nucleosome indicates__________
(a) Transcription is occuring
(b) DNA replication is occuring
(c) The DNA is condensed into a chromatin fibre
(d) The DNA double helix is exposed
Answer: C
13. DNA dependent RNA polymerase catalyses transcription on one strand of DNA which is called the________
(a) Template strand
(b) Alpha strand
(c) Antistrand
(d) Coding strand
Answer: A
Read : Reproduction in Organisms NEET Questions
14. A molecule that can act as a genetic material mustc fulfill the traits given below, except________
(a) It should be able to generate its replica
(b) It should be be unstable structurally and chemically
(c) It should provide the scope for slow changes that are required for evolution
(d) It should be able to express itself in the form of Mendelian characters
Answer: B
15. Taylor conducted the experiments to prove semi-conservative mode of chromosome replication on________
(a) Vicia faba
(b) Drosophila melanogaster
(c) E. coli
(d) Vinca rosea
Answer: A
16. In sea urchin DNA, which is double stranded 17% of the bases were shown to cytosine. The percentages of the other three bases expected to be present in this DNA are______
(a) G 34%, A 24.5%, T 24.5%
(b) G 17%, A 16.5%, T 32.5%
(c) G 17%, A 33%, T 33%
(d) G 8.5%, A 50%, T 24.5%
Answer: C
Read : What is Reproduction
17. Which one is not applicable to RNA________
(a) Complementary base pairing
(b) 5 phosphoryl and 3 hydroxyl ends
(c) Heterocyclic nitrogenous bases
(d) Chargaff ‘s rule
Answer: D
18. Transformation was discovered by_________
(a) Meselson and Stahl
(b) Hershey and Chase
(c) Griffith
(d) Watson and Crick
Answer: C
19. Removal of introns and joining of exons in a defined order during transcription is called________
(a) Splicing
(b) Inducing
(c) Slicing
(d) Looping
Answer: A
20. Removal of RNA polymerase III from nucleoplasm will affect the synthesis of________
(a) mRNA
(b) tRNA
(c) rRNA
(d) hnRNA
Answer: B
21. Which one is not a part of transcription unit in DNA?
(a) Promoter
(b) Structural gene
(c) The inducer
(d) Terminator
Answer: C
22. The unequivocal proof of DNA as the geneticvmaterial came from studies on a_________
(a) Viriod
(b) Bacterium
(c) Bacterial virus
(d) Fungus
Answer: C
23. Which are the commonly used vectors for human Genome sequencing_________
(a) Expression vectors
(b) T/A cloning vectors
(c) BAC and YAC
(d) T-DNA
Answer: C
24. Which enzyme(s) will be produced in a cell incwhich there is a non-sense mutation in the lac y gene?
(a) Lactose permease and transacetylase
(b) Lactose permease
(c)Transacetylase
(d) B-galactosidase
Answer: D
25. Basis of DNA fingerprinting is___________
(a) Relative proportion of purines and pyrimidines
(b) Relative difference in DNA occurrence in blood, skin and saliva
(c) Relative amounts of DNA in ridges and groovesc of fingerprints
(d) Satellite DNA occurring as highly repeated short DNA segments
Answer: D
26. Whose experiments cracked DNA and discovered triplet nature of genetic code?
(a) Nirenberg and Mathaei
(b) Beadle and Tatum
(c) Hershey and Chase
(d) Morgan and Sturtevant
Answer: A
27. Gene regulation governing lactose operon of E.coli that involves the lac i gene product is___________
(a) Possible and inductable because it can be
induced by lactose
(b) Negative and inducible because repressor protein prevents transcription
(c) Both a and b
(d) None
Answer: B
Class 12 Molecular Basis of Inheritance MCQs Questions and Answers Pdf :
1. The nucleic acid synthesis takes place in___________
(a) 3’-5’ direction
(b) 5’-3’ direction
(c) Both ways
(d) Any direction
Answer : B
2. What is the nature of the strands of the DNA duplex?
(a) Anti-parallel and complementary
(b) Identical and complementary
(c) Anti=parallel and non-complementary
(d) Dissimilar and non-complementary
Answer : A
3. Transcription unit__________________
(a) starts with TATA box
(b) starts with pallendrous regions and ends with rho factor.
(c) starts with promoter region and ends in terminator region
(d) starts with CAAT region.
Answer: C
4. The sequence of structural genes in lac operon is__________
(a) Lac A, Lac Y, Lac Z
(b) Lac A, Lac Z, Lac Y
(c) Lac Y, Lac A, Lac A
(d) Lac Z, Lac Y, Lac A
Answer: D
5. In a n/RNA molecule, untranslated regions (UTRs) are present at__________
(a) 5’ – end (before start codon)
(b) 3’ – end (after stop codon)
(c) both (a) and (b)
(d) 3’- end only.
Answer: C
6. In eukaryotes, RNA II facilitates transcription of___________
(a) rRNA
(b) mRNA
(c) hnRNA
(d) tRNA
Answer: C
7. Human Genome Project led to the development of____________
(a) Biotechnology
(b) Bioinformatics
(c) Biosystematics
(d) Bioengineering
Answer: B
8. Which non-radioactive isotope was used by Messelson and Stahl in their experiment?
(a) P32
(b) S35
(c) N15
(d) None
Answer: C
9. During expression of an operon, RNA polymerase binds to__________
(a) structural gene
(b) regulator gene
(c) operator
(d) promoter.
Answer: D
10. If the sequence of bases in DNA is GCTTAGGCAA then the sequence of bases in its transcript will be___________
(a) GCTTAGGCAA
(b) CGAATCCGTT
(c) CGAAUCCGUU
(d) AACGGAUUCG.
Answer: C
11. In transcription in eukaryotes, heterogenous nuclear RNA (hnRNA) is tmascribed by___________
(a) RNA polymerase I
(b) RNA polymerase II
(c) RNA poly merase II
(d) all of these.
Answer: B
12. The enzyme involved in transcription________
(a) DNA Polymerase I
(b) DNA Polymerase III
(c) RNA Polymerase
(d) DNA Polymerase II
Answer: C
13. Non-sense codons participate in____________
(a) Releasing t-RNA from polynucleotide chain
(b) Formation of unspecified amino acids
(c) Terminating message of gene-controlled protein synthesis
(d) Conversion of sense DNA into non-sense DNA
Answer: C
14. During transcription, the site of DNA molecule at which RNA polymerase binds is called_____________
(a) promoter
(b) regulator
(c) receptor
(d) enhancer.
Answer: A
15. Which of the following cannot act as inducer ?
(a) Glucose
(b) Lactose
(c) Galactos
(d) Both (a) and (c)
Answer: D
16. Which of the following statements is correct regarding ribosomes ?
(a) Most of a cell’s DNA molecule are stored there.
(b) Complete polypeptide is released from there.
(c) mRNAs are produced there.
(d) DNA replication takes place there.
Answer: B
17. The human chromosome with the highest and least number of genes in them are respectively___________
(a) chromosome 21 and Y
(b) chromosome 1 and X
(c) chromosome 1 and Y
(d) chromosome X and Y.
Answer: C
18. If the sequence of initrogen bases of the coding strand of DNA in a transcription unit is: 5’ – ATGAATG – 3’, the sequence of bases in its RNA transcript would be__________
(a) 5’ – AUG A AUG – 3’
(b) 5’ – UACUU AC – 3’
(c) 5’ – CAUUCAU – 3’
(d) 5’ – GUAAGUA – 3’.
Answer: D
19. If the sequence of bases in coding strand of DNA is ATTCGATG, then the sequence of bases in mRNA will be____________
(a) TAAGCTAC
(b) UAAGCUAC
(c) ATTCGATG
(d) AUUCGAUG.
Answer: D
20. If the base sequence of a codon in mRNA is 5’ – AUG – 3′ the sequence of tRNA pairing with it must be__________
(a) 5’ – UAC – 3’
(b) 5’ – CAU – 3’
(c) 5’-AUG – 3’
(d) 5’ – GUA – 3’
Answer: B
21. Select the incorrectly matched pairs
(a) Purines – Nitrogenous bases cytosine, thymine and uracil
(b) Recombinant DNA – DNA formed by joining the DNA segments from two different sources
(c) rRNA – RNA found in ribosomes
(d) ATP – The energy-carrying compound in the cell
Answer : A
22. The net electric charge on DNA and histones is__________
(a) both positive
(b) both negative
(c) negative and positive, respectively
(d) zero.
Answer: C
23. If a double stranded DNA has 20% of cytosine, what will be the percentage of adenine in it ?
(a) 20%
(b) 40%
(c) 30%
(d) 60%
Answer: C