Scribd
Upload
2K views3 pages

XII Biology Chromosomes and DNA Test

The document contains a 20 question multiple choice test on biology topics related to chromosomes and DNA. The questions cover topics such as types of chromosome mutations, the genetic code, structure of chromosomes, DNA and RNA, gene expression and regulation, and inheritance of genetic conditions. An answer key is provided with the correct response for each question.

Uploaded by

Samina Aftab
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOC, PDF, TXT or read online on Scribd
2K views3 pages

XII Biology Chromosomes and DNA Test

The document contains a 20 question multiple choice test on biology topics related to chromosomes and DNA. The questions cover topics such as types of chromosome mutations, the genetic code, structure of chromosomes, DNA and RNA, gene expression and regulation, and inheritance of genetic conditions. An answer key is provided with the correct response for each question.

Uploaded by

Samina Aftab
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOC, PDF, TXT or read online on Scribd
You are on page 1/ 3

XII Biology

Chromosomes and DNA

Test

Q1: When a part of chromosome is transferred to a non homologous chromosome is


called_____
a) Duplication b) Translocation
c) Inversion d) Deletion

Q2: When three nitrogen basis works for one amino acid is called______
a) Double code system b) Single code system
c) Triple code system d) Non of these

Q3: The chromatides are composed of two thin, highly coiled filaments called_____
a) Chromomeres b) Chromonema
c) Chromosomes d) Centromere

Q4: Acidic proteins are:


a) Histone proteins b) Non Histone proteins
c) Secondary proteins d) All of these

Q5: Basic unit of heredity is:


a) Chromosome b) Cell
c) Gene d) DNA

Q6: Rod shaped chromosomes have centromere at the proximal end


a) Metacentric b) Sub-metacentric
c) Telocentric c) Acrocentric

Q7: Chromosomes other than sex chromosomes are:


a) Diploid chromosomes b) Autosomes
c) Homologous chromosomes d) Haploid chromosomes

Q8: Messenger RNA is synthesized by:


a) DNA polymerase b) RNA polymerase
c) RNA ligase d) None of these

Q9: Present in RNA but not in DNA


a) Adinine b) Guanine
c) Cytosine d) Uracil

Q10: There are 20 different amino acids and for these amino acids there are_____
a) 20 codons b) 40 codons
c) 60 codons c) 80 codons
Q11: When small changes occur in the molecular structure of DNA is called
a) Chromosomal mutation b) Gene mutation
c) Gene variation c) Gene deletion

Q12: A function expressed or performed by a gene is called


a) Gene regulation b) Gene mutation
c) Gene expression d) All of these

Q13: Which process is start by RNA polymerase?


a) Translation b) Transcription
c) Translocation c) Transformation

Q14: Enzymes are responsible for the assembly of


a) Nucleic acid b) Protein
c) Carbohydrates c) All of these

Q15: When karyotype is shown by figure then it is called


a) Dendrogram b) Chi-squire
c) Idiogram d) Monogram

Q16: DNA consists of billions of small units called____


a) Nucleotides b) Nucleic acid
c) Amino acids d) None of these

Q17: Guanine and cytosine are attached together by


a) Double bond b) Triple bond
c) Single bond d) None of these

Q18: When genes move from one place to another place is called
a) Transposition b) Duplication
c) Translocation d) Point mutation

Q19: Sickle cell anemia is controlled by


a) Dominant gene b) Recessive gene
c) Haemoglobin d) Homozygous dominant gene

Q20: Cells use to make protein


a) DNA b) Nucleus
c) RNA d) Chromosomes
Answer Key
1.b, 2.c, 3.b, 4.a, 5.c, 6.c, 7.b, 8.d , 9.d, 10.c, 11.b, 12.b, 13.b, 14.d, 15.c, 16.a, 17.b, 18.a,
19.b, 20.c.

You might also like