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
Replication occurs once in every cell generation during _____.
Question # 2
Gene is the molecular unit of _______.
Question # 3
Adults usually females have XX chromosomes, which are darkly staining, condensed chromatin bodies called ______ bodies.
Question # 4
The major source of energy to perform different reactions of the body is
Question # 5
The differences between DNA and RNA include the following:
Question # 6
How many points of origin are there in praryotic cells?
Question # 7
Which one of the following is true about RNA synthesis (transcription)?
Question # 8
Euchromatin is the part of genome, and it is _____.
Question # 9
Missense mutation can result in disease like:
Question # 10
To begin translation, initiation complex includes:
Question # 11
Nucleic acids can be distinguished from proteins by _____.
Question # 12
Nonsense codons are _______ in number's?
Question # 13
The heterochromatin is usually localized to the periphery of the _____.
Question # 14
Ribosomes are made up of ______.
Question # 15
The proteins responsible for compact packing and winding of the chromosomal DNA are _____.
Question # 16
In a process called _________ , the initial tRNA is ejected from the ribosome.
Question # 17
Anti codon describes triplet bases on ______.
Question # 18
Submetacentric chromosomes have one of the following shapes:
Question # 19
Which one of the following is a type of chromosomal mutation?
Question # 20
Genes are never expressed in the following type of chromatin?
Question # 21
The sequence of nucleotides, that determines the amino acid sequence of a protein is a _____.
Question # 22
Which one of the following type of RNA is used as an adapter molecule for the formation of protein?
Question # 23
A codon for which no normal tRNA molecule exists, is called ______.
Question # 24
Which of the following amino acids are in abundance in histones?
Question # 25
In the process of translation, ______.
Question # 26
Typical form of a specie as it occurs in nature is called as:
Question # 27
Units of inheritance carried by the chromosomes are called _____.
Question # 28
How many types of RNA polymerases are in eukaryotic cells?
Question # 29
Which one of the following is the result of duplication:
Question # 30
The linkage, which is formed as a result of condensation of two monosaccharide units is:
Question # 31
Two chromosomes in a pair are classified as _____.
Question # 32
The function of mRNA is to ______.
Question # 33
Common purines are comprised of _____.
Question # 34
A chromosome segment, that is separated from the main body of the chromosome by a secondary constriction is known as:
Question # 35
Degeneracy results, because there are more codons than ______.
Question # 36
The term TBP stands for:
Question # 37
Within the chromosomes, DNA is held in complexes with _____.
Question # 38
There is/are _____ type(s) of nucleic acid(s).
Question # 39
Which one of the following is the transcribing enzyme?
Question # 40
Part of chromosome that links sister chromatids is called _____.
Question # 41
Glutamic acid is specified by ______.
Question # 42
Which one of the following might cause nondisjunction?
Total Questions
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Question # 1
Replication occurs once in every cell generation during _____.
Question # 2
Gene is the molecular unit of _______.
Question # 3
Adults usually females have XX chromosomes, which are darkly staining, condensed chromatin bodies called ______ bodies.
Question # 4
The major source of energy to perform different reactions of the body is
Question # 5
The differences between DNA and RNA include the following:
Question # 6
How many points of origin are there in praryotic cells?
Question # 7
Which one of the following is true about RNA synthesis (transcription)?
Question # 8
Euchromatin is the part of genome, and it is _____.
Question # 9
Missense mutation can result in disease like:
Question # 10
To begin translation, initiation complex includes:
Question # 11
Nucleic acids can be distinguished from proteins by _____.
Question # 12
Nonsense codons are _______ in number's?
Question # 13
The heterochromatin is usually localized to the periphery of the _____.
Question # 14
Ribosomes are made up of ______.
Question # 15
The proteins responsible for compact packing and winding of the chromosomal DNA are _____.
Question # 16
In a process called _________ , the initial tRNA is ejected from the ribosome.
Question # 17
Anti codon describes triplet bases on ______.
Question # 18
Submetacentric chromosomes have one of the following shapes:
Question # 19
Which one of the following is a type of chromosomal mutation?
Question # 20
Genes are never expressed in the following type of chromatin?
Question # 21
The sequence of nucleotides, that determines the amino acid sequence of a protein is a _____.
Question # 22
Which one of the following type of RNA is used as an adapter molecule for the formation of protein?
Question # 23
A codon for which no normal tRNA molecule exists, is called ______.
Question # 24
Which of the following amino acids are in abundance in histones?
Question # 25
In the process of translation, ______.
Question # 26
Typical form of a specie as it occurs in nature is called as:
Question # 27
Units of inheritance carried by the chromosomes are called _____.
Question # 28
How many types of RNA polymerases are in eukaryotic cells?
Question # 29
Which one of the following is the result of duplication:
Question # 30
The linkage, which is formed as a result of condensation of two monosaccharide units is:
Question # 31
Two chromosomes in a pair are classified as _____.
Question # 32
The function of mRNA is to ______.
Question # 33
Common purines are comprised of _____.
Question # 34
A chromosome segment, that is separated from the main body of the chromosome by a secondary constriction is known as:
Question # 35
Degeneracy results, because there are more codons than ______.
Question # 36
The term TBP stands for:
Question # 37
Within the chromosomes, DNA is held in complexes with _____.
Question # 38
There is/are _____ type(s) of nucleic acid(s).
Question # 39
Which one of the following is the transcribing enzyme?
Question # 40
Part of chromosome that links sister chromatids is called _____.
Question # 41
Glutamic acid is specified by ______.
Question # 42
Which one of the following might cause nondisjunction?
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: 02-09-2026
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