CUET Biology mock test of Molecular Basis of Inheritance 2023

Here you will get CUET (UG) Biology chapterwise mock test, in this blog you will get Molecular basis of inheritance mock test for your CUET (UG) Biology exam. CUET undergraduate mock test of biology chapter molecular basis of inheritance is prepared by experts teacher which will help you alot in your preparation .The mock test of cuet biology is also helpful for those who are looking for Biotechnology since CUET syllabus of biology is also for biotechnology .

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CUET (UG) Biology mock test will help you to improve your speed and efficiency of solving questions . Candidates must practice as much mock test as possible to understand their weak point and improve them before the actal exam . Below we have provided the CUET (UG) mock test or test paper of biology chapter Molecular basis of inheritance Objective questions whose answers is given at the end .

CUET 2023 biology test paper of Molecular Basis of Inheritance:

Instructions :

  • Kindly attempt the below questions in exam like environment without using any devices and google search.
  • Try to solve the questions in a time limit of max 25 min .
  • write your answers in a paper and at the end match your answers from the answer key provided at the end .
  1. The length of DNA usually depends on
    (a) position of nucleotides (b) number of nucleotides
    (c) Both (a) and (b) (d) None of the above
  1. In prokaryotes (such as E. coli) …A… nucleus is not present, the DNA is not scattered throughout the cell. DNA is …B… charged and holded by the …C… charged proteins. This structure in prokaryotes is called …D… . Choose the correct option for A, B, C and D.
    (a) A–undefined, B–negatively, C–positively, D–nucleoid
    (b) A–undefined, B–negatively, C–positively, D–nucleus
    (c) A–defined, B–negatively, C–positively, D–nucleoid
    (d) A–defined, B–positively, C–negatively, D–nucleoid
  1. Nitrogenous bases are linked to sugar by
    (a) hydrogen bond (b) phosphodiester bond
    (c) N-glycosidic bond (d) O-glycosidic bond
  2. When a phosphate group is linked to …A… group of nucleoside through …B… bond, a corresponding …C… is formed.
    Choose the correct option for A, B and C
    (a) A–5′ OH, B–phosphodiester bond, C–nucleotide
    (b) A–3′ OH, B–phosphodiester bond, C–nucleotide
    (c) A–2′ OH, B–phosphodiester bond, C–nucleotide
    (d) A–5′ OH, B–phosphodiester bond, C–nucleoside
  3. Choose the correct option.
    (a) Pyrimidines include adenine and guanine
    (b) Pyrimidines include cytosine, uracil and thymine
    (c) Purines include adenine and thymine
    (d) Purines include guanine and cytosine
  4. A polymer or a polynucleotide chain has at one end a free ……..A……. at 5′ end of sugar, similarly at the other end of the polymer the sugar has a free …..B….. of 3′ group.
    (a) A – Phosphate moiety, B – OH
    (b) A – OH, B – Phosphate moiety
    (c) A – COOH, B – Phosphate moiety
    (d) A – Phosphate moiety, B–COOH
  5. Choose the incorrect option.
    (a) Friedrich Miescher in 1869 identified DNA as an acidic substance and named it nuclein
    (b) Erwin Chargaff said, the ratio between A and T and G and C of dsDNA are constant and equals one
    (c) The two strands of dsDNA are complementary to each other
    (d) None of the above
  1. Lightly stained part of chromatin which remains loosely packed and is transcriptionally active named as
    (a) euchromatin (b) heterochromatin
    (c) chromatosome (d) chromonemata
  2. What was unique in Griffith’s experiments?
    (a) DNA was found to be the genetic material
    (b) RNA was found to be the genetic material
    (c) Something from dead organisms could change the
    living cells
    (d) Viruses can live in bacteria
  3. Isotopes used by Hershey and Chase were
    (a) 32P and 35S (b) 35P and 32S
    (c) 34P and 31S (d) 30P and 32S
  4. Hershey and Chase concluded that viral infecting agent in their experiment was
    (a) Protein (b) DNA
    (c) RNA (d) Both (b) and (c)
  1. RNA is the genetic material in
    (a) All bacteria
    (b) Tobacco Mosaic Viruses (TMV)
    (c) QB bacteriophage
    (d) Both (b) and (c)
  2. Who experimentally proved the semiconservative mode of DNA replication?
    (a) Mathew Meselson (b) Franklin Stahl
    (c) Both (a) and (b) (d) Watson and Crick
  1. Similar experiments like Meselson and Stahl was performed by Taylor in 1958. The experimental organism of Taylor was
    (a) Vicia faba (b) Fungi (c) E. coli (d) Protista
  2. For long DNA molecules, the two strands of DNA cannot be separated in its entire length due to the requirement of
    (a) enzymes
    (b) high energy
    (c) RNA
    (d) phosphate and nucleotide
  1. Codons are non-ambiguous, which means that one codon codes for
    (a) more than one amino acid
    (b) two amino acids
    (c) Only one amino acid
    (d) non-sense amino acid
  2. Degeneracy refers to
    (a) one amino acid has more than one code triplet
    (b) one amino acid has only one code triplet
    (c) codons which specify the same amino acids differ only in the third base of the triplet
    (d) Both (a) and (c)
  3. Choose the incorrect option for tRNA molecule.
    (a) It has an anticodon loop that has bases complementary to the code
    (b) It has an amino acid acceptor end to which it binds to amino acids
    (c) tRNA are not specific for each amino acid
    (d) tRNA looks like a clover leaf
  4. The process of polymerisation of amino acids to form a polypeptide is
    (a) transcription (b) replication
    (c) translation (d) polymerisation
  5. Which among the following process occur(s) during charging or aminoacylation of tRNA?
    (a) Activation of amino acids in the presence of ATP
    (b) Linking of amino acids to their cognate tRNA
    (c) Both (a) and (b)
    (d) None of the above
  6. UTRs present on mRNA refer to
    (a) Untranscribed regions at both 5¢ end and 3¢ end
    (b) Untranslated regions at 5¢ end
    (c) Untranslated regions at both 5¢ end and 3¢ end
    (d) Untranslated regions at 3¢ end
  7. Termination of protein synthesis or translation requires
    (a) Both stop signal and starting codon
    (b) Both starting codon and release factor
    (c) Both release factor and stop codon
    (d) GUG and AUG codon
  1. Positively regulatory proteins are called
    (a) activator (b) repressors
    (c) necessary proteins (d) accessory proteins
  2. Lactose is a substrate for
    (a) galactosidase (b) a-galactosidase
    (c) b-galactosidase (d) g-galactosidase
  3. Lactose is transported into cells through
    (a) b-galactosidase (b) permease
    (c) transacetylase (d) transferase
  4. Why glucose and galactose cannot act as an inducer for lac operon?
    (a) Because they cannot bind with the repressor
    (b) Because they can bind with the repressor
    (c) Because they can bind with the operator
    (d) Because they can bind with the regulator
  5. Which of the following option is true for Human Genome Project (HGP)?
    (a) It was launched in the year 1990 and was called mega project
    (b) Total estimated cost of the project would be 9 billion US dollars
    (c) It aims to identify all 20000-25000 genes in human DNA
    (d) All of the above
  6. Identify the incorrect pair.
    (a) Expressed sequence tags — Genes that are express as RNA
    (b) Sequence annotation — Sequencing genome with coding sequences
    (c) Automated DNA sequences — Work on the principle developed by Frederick Sanger
    (d) None of the above
  7. DNA fingerprinting involves identifying the differences in some specific regions in DNA sequence called
    (a) non-repetitive DNA
    (b) coding DNA
    (c) non-coding DNA
    (d) repetitive DNA
  8. Alec Jeffreys used a satellite DNA as probe that shows very high degree of polymorphism. It was called as
    (a) Short Number of Tandem Repeats (SNTRs)
    (b) Large Number of Tandem Repeats (LNTRs)
    (c) Variable Number of Tandem Repeats (VNTRs)
    (d) All of the above

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CUET biology test paper of Molecular Basis of Inheritance answers :

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