Molecular Basis of Inheritance PYQs Set 5 (PDF)

Set 5 of 5 · Questions 121-143 of 143

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Mere Teacher · Previous Year Questions NEET Biology · Molecular Basis of Inheritance · Set 5 (Q121-143)
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121. $The lac operon consists of$ (1) $Four regulatory genes only.$ (2) $One regulatory gene and three structural genes.$ (3) $Two regulatory genes and two structural genes.$ (4) $Three regulatory genes and three structural genes.$ 122. $Satellite DNA is important because it:$ (1) $Shows high degree of polymorphism in population and also the same degree of polymorphism in an individual, which is heritable from parents to children$ (2) $Does not code for proteins and is same in all members of the population$ (3) $Codes for enzymes needed for DNA repletion$ (4) $Codes for proteins needed in cell cycle.$ 123. $What is not true for genetic code :-$ (1) $It is unambiguous$ (2) $A codon in mRNA is read in a noncontiguous fashion$ (3) $It is nearly universal$ (4) $It is degenerate$ 124. $The equivalent of a structural gene is$ (1) $Cistron$ (2) $Operon$ (3) $Recon$ (4) $Muton$ 125. $Balbiani rings are sites of$ (1) $Nucleotide synthesis$ (2) $Polysaccharide synthesis$ (3) $RNA and protein synthesis$ (4) $Lipid synthesis$ 126. $DNA fragments are:$ (1) $Negatively charged$ (2) $Neutral$ (3) $Either positively or negatively charged depending on their size$ (4) $Positively charged$ 127. $Satellite DNA is a useful tool in$ (1) $Organ transplantation$ (2) $Sex determination$ (3) $Forensic science$ (4) $Genetic engineering$ 128. $DNA polymorphism forms the basis of:$ (1) $DNA finger printing$ (2) $Both genetic mapping and DNA finger printing$ (3) $Translation$ (4) $Genetic mapping$ 129. $Satellite DNA is useful tool in :$ (1) $Forensic science$ (2) $Genetic engineering$ (3) $Organ transplantation$ (4) $Sex determination$ 130. $Spliceosomes are not found in cells of;$ (1) $Fungi$ (2) $Animals$ (3) $Bacteria$ (4) $Plants$ 131. $Identify the correct statement.$ (1) $In capping, methyl guanosine triphosphate is added to the 3' end of hnRNA.$ (2) $RNA polymerase binds with Rho factor to terminate the process of transcription in bacteria.$ (3) $The coding strand in a transcription unit is copied to an mRNA.$ (4) $Split gene arrangement is characteristic of prokaryotes.$ 132. $In the process of transcription in Eukaryotes, the RNA polymerase I transcribes :-$ (1) $mRNA with additional processing, capping and tailing$ (2) $tRNA, 5 S rRNA and snRNAs$ (3) $rRNAs-28 S, 18 S and 5.8 S$ (4) $Precursor of mRNA, hnRNA$ 133. $Triticale, the first man-made cereal crop, has been obtained by crossing wheat with-$ (1) $Rye$ (2) $Pearl millet$ (3) $Sugarcane$ (4) $Barley$ 134. $A molecule that can act as a genetic material must fulfill the traits given below, except :-$ (1) $It should be unstable structurally and chemically$ (2) $It should provide the scope for slow changes that are required for evolution$ (3) $It should be able to express itself in the form of 'Mendelian characters'$ (4) $It should be able to generate its replica$ 135. $Purines found both in DNA and RNA are :-$ (1) $Adenine and thymine$ (2) $Adenine and guanine$ (3) $Guanine and cytosine$ (4) $Cytosine and thymine$ 136. $One turn of the helix in a B-form DNA is approximately$ (1) $20 nm$ (2) $0.34 nm$ (3) $3.4 nm$ (4) $2 nm$ 137. $One gene-one enzyme hypothesis was postulated by$ (1) $R. Franklin$ (2) $Hershey and Chase$ (3) $A. Garrod$ (4) $Beadle and Tatum$ 138. $Removal of introns and joining the exons in a defined order in a transcription unit is called :-$ (1) $Capping$ (2) $Splicing$ (3) $Tailing$ (4) $Transformation$ 139. $In lac operon, z gene codes for :$ (1) $β-galactosidase$ (2) $Permease$ (3) $Repressor$ (4) $Transacetylase$ 140. $In the DNA molecule :-$ (1) $the proportion of Adenine in relation to thymine varies with the organism$ (2) $there are two strands which run antiparallel one in 5' \to 3' direction and other in 3' \to 5'$ (3) $the total amount of purine nucleotides and pyrimidine nucleotides is not always equal$ (4) $there are two strands which run parallel in the 5' \to 3' direction$ 141. $DNA replication in bacteria occurs:$ (1) $Within nucleolus$ (2) $Prior to fission$ (3) $Just before transcription$ (4) $During S phase$ 142. $Select the correct Match :$ (1) $Ribozyme - Nucleic acid$ (2) $F_{2} \times Recessive parent - Dihybrid cross$ (3) $T.H. Morgan - Transduction$ (4) $G. Mendel - Transformation$ 143. $Point mutation involves :-$ (1) $Deletion$ (2) $Insertion$ (3) $Change in single base pair$ (4) $Duplication$