Chromosomes MCQ Advance Level

Chromosomes MCQ Advance Level

Dear Readers,

Zoology is considered to be one of the scoring section. If prepared thoroughly, Zoology can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1. Whereas the number of chromosomes is reduced to half in first reduction division of meiosis, then what is the need for second mitotic division

•  For the segregation of replicated chromosomes
•  For equal distribution of haploid chromosomes
•  For the formation of four gametes
•  For the equal distribution of genes on chromosomes

For the segregation of replicated chromosomes

Q2. The polytene chromosomes were discovered for the first time in

•  Chironomus
•  Fruitfly
•  Drosophila
•  House fly

Chironomus

Q3. The point at the which the polytene chromosomes appear to be attached together is known as

•  Centriole
•  Chromocentre
•  Centromere
•  Chromomere

Chromocentre

Q4. What is the chromosome number of plasmodium

•  18
•  14
•  10
•  9

10

Q5. How many nucleosomes are found in helical coil of 30 nm chromatin fibre

•  10
•  12
•  06
•  09

06

Q6. If the number of chromosomes in most body cells of a mammal is 40, the cells in the seminiferous tubule will have

•  40 chromosomes
•  20 chromosomes
•  10 chromosomes
•  While some other will have 20

While some other will have 20

Q7. Balbiani discovered special type of chromosome from the salivary gland of chironomus larva which are recognized by the presence of

•  Bands
•  Loops
•  Both bands and loops
•  All of the above

Both bands and loops

Q8. A cistron is

•  Structural unit of gene
•  Functional unit of RNA
•  Functional unit of gene
•  Replication unit of gene

Functional unit of gene

Q9. Genetic information are carried in form of long chain of molecules made up of

•  Amino acids
•  RNA
•  Nucleotides
•  Polypeptides

Nucleotides

Q10. The human chromosomes are divided into 7 groups, B-chromosomes are

•  6-12
•  1-2
•  13-15
•  4-5

4-5