Zoology
If two different cells are labelled, one with a red fluorescent dye and the other with a green dye and then fused together and kept at 37°C, after sometime the fused cell will:
A.
Have one half red and one half green in colour
B.
Take only red colour
C.
Have both red and green colour thoroughly mixed
D.
Take only green colour
The mutation which creates a change from wild type to abnormal type is known as:
A.
Induced mutation
B.
Forward mutation
C.
Backward mutation
D.
None of these
How many pairs of contrasting characters were used by Mendel in his breeding experiments?
A.
9 pairs
B.
8 pairs
C.
7 pairs
D.
6 pairs
Cross between offsprings and parents is known as:
A.
Back cross
B.
Reciprocal cross
C.
Polyhybrid cross
D.
Monohybrid cross
The plant used by Mendel for his experiment was:
A.
Evening primrose
B.
Four O'clock plant
C.
Garden pea
D.
Snap dragon
The nonstainable part of chromosome dividing it into arms is:
A.
Chromomere
B.
Satellite
C.
Centromere
D.
Kinetochore
Constitutive heterochromatin represents:
A.
Non-expressed RNA
B.
Exon parts of DNA
C.
Jumping genes
D.
Non-expressed DNA sequence at centromere
Ribozyme is:
A.
RNA
B.
RNA without sugar
C.
RNA having enzyme activity
D.
RNA with extra phosphate
The microtubules occurring between the chromosomes are known as:
A.
Intrachromosomal fibres
B.
Interzonal fibres
C.
Intrazonal fibres
D.
Interchromosomal fibres
A primary spermatocyte with chromosome number = 24, produces two spermatids after successive divisions. The chromosome number in spermatid is:
A.
24
B.
12
C.
6
D.
48
The mitochondrial clouds in some amphibians and birds are found in:
A.
Oogonia
B.
Oocyte
C.
Polar body
D.
Nucleus
Arrhcnotokous parthenogenesis gives rise to:
A.
Haploid individuals
B.
Diploid individuals
C.
Polyploid individuals
D.
Tetraploid individuals
During protein synthesis the process of initiation, elongation and termination involves hydrolysis to provide energy:
A.
ATP
B.
GTP
C.
CPP
D.
None of these
In the membrane bound polyribosomes, the polypeptide chain grows on the messenger RNA and:
A.
Is inserted into the lumen of the ER membrane
B.
Released in the cytoplasm
C.
Translocated to mitochondria
D.
Translocated to nucleus
During the replication of DNA one new strand is a continuous stretch, the other one is a discontinuous strand with short segments. These two are called respectively:
A.
Leading strand, lagging strand
B.
Lagging strand, leading strand
C.
Leading strand, okazaki fragments
D.
Lagging strand, okazaki fragments
The DNA polymerase can polymerise the nucleotides only in the:
A.
5'-3' direction
B.
3'-5' direction
C.
Both the directions
D.
Direction of the promoter
Genetic variation is sexually reproducing organisms arises by:
A.
Independent assortment of chromosomes during meiosis
B.
Mutation
C.
Crossing over
D.
All of these
Giant salivary gland chromosomes are the resultant of:
A.
Only mitosis and no meiosis
B.
Meiosis followed by mitosis
C.
Mitosis followed by meiosis
D.
Only meiosis and no mitosis
Which dye can be more useful to different individual chromosome pairs in a group, through similar in size?
A.
Quinacrine mustard
B.
Carmine
C.
Hematoxylin
D.
None of these
The reconstruction or reorganization phase, resulting in the constitution of two daughter nuclei is:
A.
Anaphase
B.
Diplotene
C.
Prophase - I
D.
Telophase
Somatic hybridization includes:
A.
Fusion of nuclei of diploid somatic cells
B.
Fusion of protoplasts of diploid somatic cells
C.
Fusion of nuclei of haploid somatic cells
D.
Fusion of protoplasts of haploid somatic cells
Complementary genes are:
A.
Fractions of a single gene controlling several characters
B.
One pair of genes showing two characters
C.
Two pairs of genes producing the same characters
D.
Two pairs of genes producing different characters
The loops of Lampbrush chromosomes are:
A.
Inactive sites
B.
Active sites of carbohydrate synthesis
C.
Active sites for the synthesis of RNA and some proteins
D.
Active sites of lipid synthesis
The Philadelphia chromosome is found in the patients suffering from:
A.
Albinism
B.
Hepatitis
C.
Sickle cell anaemia
D.
Leukaemia
Movement of chromosome on the mitotic spindle is:
A.
Independent of spindle fibre
B.
Due to interaction of chromosomes on the spindle
C.
Due to cytoplasmic streaming
D.
Dependent on association of spindle fibres with kinetochore