Chapter 20 Chromosomes And Dna Biology 12th Class Punjab MCQ Tests
12th Class Biology Chapter 20 MCQ Tests
Chapter 20 of 12th Class Biology has 42 questions. If you take an online MCQ test, the system will randomly choose the questions. If you want to take the quiz by chapter then click the start test button.
Total Questions: 42
Total Marks: 42
Time: 45 Mins
Total Questions: 42
Total Marks: 42
Time: 45 Mins
45Min : 00 Sec Remaining
Question # 1
There is/are _____ type(s) of nucleic acid(s).
Question # 2
Two chromosomes in a pair are classified as _____.
Question # 3
The differences between DNA and RNA include the following:
Question # 4
The function of mRNA is to ______.
Question # 5
Common purines are comprised of _____.
Question # 6
The sequence of nucleotides, that determines the amino acid sequence of a protein is a _____.
Question # 7
Genes are never expressed in the following type of chromatin?
Question # 8
The proteins responsible for compact packing and winding of the chromosomal DNA are _____.
Question # 9
How many types of RNA polymerases are in eukaryotic cells?
Question # 10
Which one of the following type of RNA is used as an adapter molecule for the formation of protein?
Question # 11
Part of chromosome that links sister chromatids is called _____.
Question # 12
Submetacentric chromosomes have one of the following shapes:
Question # 13
Euchromatin is the part of genome, and it is _____.
Question # 14
Nonsense codons are _______ in number's?
Question # 15
The heterochromatin is usually localized to the periphery of the _____.
Question # 16
In the process of translation, ______.
Question # 17
The term TBP stands for:
Question # 18
Which one of the following might cause nondisjunction?
Question # 19
In a process called _________ , the initial tRNA is ejected from the ribosome.
Question # 20
The major source of energy to perform different reactions of the body is
Question # 21
A chromosome segment, that is separated from the main body of the chromosome by a secondary constriction is known as:
Question # 22
Which of the following amino acids are in abundance in histones?
Question # 23
Which one of the following is a type of chromosomal mutation?
Question # 24
Which one of the following is the transcribing enzyme?
Question # 25
Gene is the molecular unit of _______.
Question # 26
Units of inheritance carried by the chromosomes are called _____.
Question # 27
Glutamic acid is specified by ______.
Question # 28
Typical form of a specie as it occurs in nature is called as:
Question # 29
Replication occurs once in every cell generation during _____.
Question # 30
A codon for which no normal tRNA molecule exists, is called ______.
Question # 31
Degeneracy results, because there are more codons than ______.
Question # 32
To begin translation, initiation complex includes:
Question # 33
Anti codon describes triplet bases on ______.
Question # 34
Which one of the following is true about RNA synthesis (transcription)?
Question # 35
The linkage, which is formed as a result of condensation of two monosaccharide units is:
Question # 36
Within the chromosomes, DNA is held in complexes with _____.
Question # 37
Adults usually females have XX chromosomes, which are darkly staining, condensed chromatin bodies called ______ bodies.
Question # 38
Missense mutation can result in disease like:
Question # 39
Which one of the following is the result of duplication:
Question # 40
Ribosomes are made up of ______.
Question # 41
How many points of origin are there in praryotic cells?
Question # 42
Nucleic acids can be distinguished from proteins by _____.
Total Questions
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Question # 1
There is/are _____ type(s) of nucleic acid(s).
Question # 2
Two chromosomes in a pair are classified as _____.
Question # 3
The differences between DNA and RNA include the following:
Question # 4
The function of mRNA is to ______.
Question # 5
Common purines are comprised of _____.
Question # 6
The sequence of nucleotides, that determines the amino acid sequence of a protein is a _____.
Question # 7
Genes are never expressed in the following type of chromatin?
Question # 8
The proteins responsible for compact packing and winding of the chromosomal DNA are _____.
Question # 9
How many types of RNA polymerases are in eukaryotic cells?
Question # 10
Which one of the following type of RNA is used as an adapter molecule for the formation of protein?
Question # 11
Part of chromosome that links sister chromatids is called _____.
Question # 12
Submetacentric chromosomes have one of the following shapes:
Question # 13
Euchromatin is the part of genome, and it is _____.
Question # 14
Nonsense codons are _______ in number's?
Question # 15
The heterochromatin is usually localized to the periphery of the _____.
Question # 16
In the process of translation, ______.
Question # 17
The term TBP stands for:
Question # 18
Which one of the following might cause nondisjunction?
Question # 19
In a process called _________ , the initial tRNA is ejected from the ribosome.
Question # 20
The major source of energy to perform different reactions of the body is
Question # 21
A chromosome segment, that is separated from the main body of the chromosome by a secondary constriction is known as:
Question # 22
Which of the following amino acids are in abundance in histones?
Question # 23
Which one of the following is a type of chromosomal mutation?
Question # 24
Which one of the following is the transcribing enzyme?
Question # 25
Gene is the molecular unit of _______.
Question # 26
Units of inheritance carried by the chromosomes are called _____.
Question # 27
Glutamic acid is specified by ______.
Question # 28
Typical form of a specie as it occurs in nature is called as:
Question # 29
Replication occurs once in every cell generation during _____.
Question # 30
A codon for which no normal tRNA molecule exists, is called ______.
Question # 31
Degeneracy results, because there are more codons than ______.
Question # 32
To begin translation, initiation complex includes:
Question # 33
Anti codon describes triplet bases on ______.
Question # 34
Which one of the following is true about RNA synthesis (transcription)?
Question # 35
The linkage, which is formed as a result of condensation of two monosaccharide units is:
Question # 36
Within the chromosomes, DNA is held in complexes with _____.
Question # 37
Adults usually females have XX chromosomes, which are darkly staining, condensed chromatin bodies called ______ bodies.
Question # 38
Missense mutation can result in disease like:
Question # 39
Which one of the following is the result of duplication:
Question # 40
Ribosomes are made up of ______.
Question # 41
How many points of origin are there in praryotic cells?
Question # 42
Nucleic acids can be distinguished from proteins by _____.
Total Questions
123456789101112131415161718192021222324252627282930313233343536373839404142
Biology MCQ Test by Topics
- +20.1 Types of Chromosomes
- +20.2 Composition of Chromosome
- +20.3 The Chromosomal Theory of Inheritance
- +20.4 DNA as Hereditary Material
- +20.5 Chemical Nature of DNA
- +20.5.1 Double Helical Structure of DNA (Watson and Crick,s Model)
- +20.5.2 DNA Replication
- +20.5.3 The Meselson - Stahl Experiment
- +20.5.4 The Replication Process
- +20.6 What is a Gene?
- +20.6.1 One - gene-one - polypeptide Hypothesis
- +20.6.2 How DNA encodes protien Structure?
- +20.7 Cells use RNA to make Protien
- +20.7.1 Three types of RNA
- +20.7.2 Transcription
- +20.8 Genetic Code
- +20.9 Translation
- +20.10 Mutations
Biology
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Updated on: 13-05-2026
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