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Hassan
1.A mixture of two immiscible liquids shaken up is?
A. Saturated solution
B. Saturated solution
C. An emulsion
D. Saturated solution
2.A plant bearing both male and female flowers is said to be?
A. Dioecious
B. Monoecious
C. Polygamous
D. Dioecious
3.Bar is a gene often used in recombination study. Which of the following is true for the Bar gene?
A. It is normally present in two copies
B. Three copies of bar are called ultra bar
C. Heterozygous bar females have a less severe
D. It is normally present in two copies
4.Consider that recombination occurs in 2 strand stage of meiosis. If a Drosophila is heterozygous for the bar locus what will be the result of recombination?
A. The recombination will make them homozygous
B. It will produce ultra bar phenotype
C. It will be heterozygous
D. The recombination will make them homozygous
5.If two genes are unlinked the recombination frequency will be?
A. 25%
B. 50%
C. 75%
D. 25%
6.How many rounds of replication in BrdU will be needed to visualize Harlequin chromosome?
A. One
B. Two
C. Three
D. One
7.Is two crossovers occur between same two strands, this will result in?
A. All recombinant strands
B. Three recombinant strands with different loci exchanged
C. Exchange of middle portion between two strands
D. All recombinant strands
8.Double cross over involving strands result in 100% recombinant strands.
A. 1strand
B. 2 strands
C. 3 strands
D. 1strand
9.How many kinds of mutation are found in DNA which includes mutation of only one base?
A. 1
B. 2
C. 3
D. 1
10.What is the overall rate at which new mutations arise spontaneously at any given site on the chromosome per round of replication?
A. ≈ 10-8 – 10-12
B. ≈ 10-7 – 10-9
C. ≈ 10-7 – 10-9
D. ≈ 10-8 – 10-12
11.What is the overall rate at which new mutations arise spontaneously at any given site on the chromosome per round of replication?
A. ≈ 10-8 – 10-12
B. ≈ 10-7 – 10-9
C. ≈ 10-6 – 10-11
D. ≈ 10-8 – 10-12
12.What is the dinucleotide sequence of micro satellites?
A. CA
B. AT
C. CC
D. CA
13.Micro-satellites involves the repeats of the dinucleotide sequence of CA. the CA repeat is found at many widely scattered sites in the genome of humans and other eukaryotes.
A. Replication
B. Transcription
C. Translation
D. Replication
14.How many steps are required to attain mismatch repair?
A. 1
B. 2
C. 3
D. 1
15.The term ‘endonuclease’ refers to cutting the DNA sequence from?
A. only within the polynucleotide chain, not at the ends
B. only within the polynucleotide chain, not at the ends
C. anywhere in the chain
D. only within the polynucleotide chain, not at the ends
16.The restriction endonuclease is having a defence mechanism in the bacterial system against foreign DNA such as viruses. But how it is able to protect its own DNA?
A. By methylation of bacterial DNA by restriction enzyme
B. By methylation of foreign DNA by restriction enzyme
C. By phosphorylation of bacterial DNA by restriction enzyme
D. By methylation of bacterial DNA by restriction enzyme
17.Even after replication, how the modified DNA remains protected?
A. It remains protected because of conservative mode of replication
B. It remains protected because of semi-conservative mode of replication
C. The mode of replication has no role to play in the protection
D. It remains protected because of conservative mode of replication
18.How many classes of restriction enzymes are there?
A. 1 Class
B. 2 Classes
C. 3 Classes
D. 1 Class
19.Carpogonia is the female sex organ in which of the algae?
A. Rhodophycophyta
B. Xanthophycophyta
C. Chrysophycophyta
D. Rhodophycophyta
20.The xanthophyte walls are typically of?
A. chitin
B. cellulose
C. cellulose and pectin
D. chitin
21.Chrysamoeba exists in which of the following forms?
A. Nonmotile coccoid
B. filamentous
C. amoeboid
D. Nonmotile coccoid
22.Kelps are which of the following type of algae?
A. Red algae
B. Yellow algae
C. Brown algae
D. Red algae
23.Frustules are found in which of the following algae?
A. Bacillariophycophyta
B. Chlorophycophyta
C. Euglenophycophyta
D. Bacillariophycophyta
24.Which of the following are formed in pyrenoids?
A. Oil
B. Glucose
C. Starch
D. Oil
25.In Chlamydomonas the most common method of sexual reproduction is?
A. isogamy
B. heterogamy
C. oogamy
D. isogamy
26.Which of the following is a colonial green alga?
A. Chlamydomonas
B. Chlorella
C. Volvox
D. Chlamydomonas
27.Fungi are ?
A. Prokaryotic
B. eukaryotic
C. prokaryotic and lack chlorophyll
D. Prokaryotic
28.Hyphal wall consists of microfibrils composed of?
A. hemicellulose or chitin
B. cellulose
C. lipids
D. hemicellulose or chitin
29.Coenocytic hyphae have?
A. Septate with uninucleate cells
B. Septate with multinucleate cells
C. No septate
D. Septate with uninucleate cells
30.What is Cytogenetics?
A. Genetic disorders
B. Phenotypic variation
C. Study of chromosomes
D. Genetic disorders
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