MCQ’S ON TRANSDUCTION
1. Through transduction when a recipient bacterial cell picks up bacterial DNA, then
(a) the new DNA replicates every time the recipient undergoes multiplication
(b) the DNA is destroyed
(c) the DNA modifies to match/compliment that of the recipient
(d) the new DNA should enter a new bacteriophage or it is lost
Answer: (a)
2. A specialized transducing phage that attacks an infected cell with lysogenic stage of the same virus produces
(a) HFT
(b) HFR
(c) F
(d) F`
Answer: (a)
3. This is the role undertaken by bacteriophage in transduction
(a) episome
(b) recipient
(c) donor
(d) vector
Answer: (d)
4. The ability of cells to uptake DNA fragments from the surroundings is known as
(a) HFR
(b) Competence
(c) Fecundity
(d) Fitness
Answer: (b)
5. Who discovered Transduction
(a) Iwanowsky
(b) Hayes, Lederberg and Woolman
(c) Griffith
(d) Lederberg and Zinder
Answer: (d)
6. This process involves transferring naked DNA fragments between bacteria
(a) Vectoring
(b) Transformation
(c) Transduction
(d) Conjugation
Answer: (b)
7. This is the virulence of viruses producing bacterial cell after infection if a specialized transducing virus attacks a healthy bacterial cell
(a) Virulence depreciates
(b) Equal virulence seen as the original one
(c) More virulence than the original one observed
(d) No virulence
Answer: (d)
8. It is ___________ when the phage tranduces those bacterial genes only which are adjoining to the prophage in the bacterial chromosome
(a) conjugation
(b) restricted transduction
(c) specialized transduction
(d) generalized transduction
Answer: (b)
9. This is incorrect regarding specialized transduction
(a) observed in lambda phages such as K12
(b) viral genome is incorporated in the bacterial genome
(c) variety of genes can be transformed in this case
(d) lysogenic viruses are capable of performing this
Answer: (c)
10. This virus is used for transduction
(a) Lambda phage
(b) T7 phage
(c) T4 phage
(d) T2 phage
Answer: (a)
MCQ’S ON EMP PATHWAY
1. This enzyme catalyzes the transfer of a phosphoryl group from ATP to glucose
(a) Hexokinase
(b) Phosphoglucose isomerase
(c) Aldolase
(d) Phosphoglucose mutase
Answer: (a)
2. Glycolysis is the conversion of
(a) Fructose into phosphoenolpyruvate
(b) Fructose into pyruvate
(c) Glucose into phosphoenolpyruvate
(d) Glucose into pyruvate
Answer: (d)
3. The EMP pathway in eukaryotes usually takes place in
(a) nucleus
(b) lysosome
(c) Golgi apparatus
(d) cytosol
Answer: (d)
4. In the last step of the EMP pathway or glycolysis, this substrate is used
(a) Phosphoenolpyruvate
(b) Pyruvate
(c) 1, 3-bisphosphoglycerate
(d) Glyceraldehyde 3-phosphate
Answer: (a)
5. When yeasts carry out alcoholic fermentation of glucose, the coenzyme – thiamine pyrophosphate is needed by
(a) transaldolase
(b) pyruvate decarboxylase
(c) lactate dehydrogenase
(d) hexokinase
Answer: (b)
6. The activity of this enzyme increases when the ATP supply of a cell depletes
(a) Glucokinase
(b) Phosphofructokinase-1
(c) Hexokinase
(d) Pyruvate kinase
Answer: (b)
7. This is not one of the steps between the glycolysis of glyceraldehyde 3-phosphate and 3-phosphoglycerate
(a) formation of 1,3-bisphosphoglycerate
(b) oxidation of NADH to NAD+
(c) ATP synthesis
(d) catalysis by phosphoglycerate kinase
Answer: (b)
8. In EMP pathway, the process by which ATP is formed from ADP is
(a) reduction
(b) oxidative phosphorylation
(c) substrate-level phosphorylation
(d) photo phosphorylation
Answer: (c)
9. In erythrocytes, the EMP pathway or glycolysis produces pyruvate which is metabolized further to
(a) haemoglobin
(b) ethanol
(c) lactate
(d) CO2
Answer: (c)
10. This enzyme catalyzes the first step of glycolysis or the EMP pathway
(a) Glucokinase
(b) Pyruvate kinase
(c) Phosphofructokinase-1
(d) Hexokinase
Answer: (d)
MCQ’S ON PINUS
1. “Chilgoza” a popular dry fruit is a production of
(a) Pinus gerardiana
(b) Pinus sylvestris
(c) Pinus roxburghii
(d) Pinus monophylla
Answer: (a)
2. Mesophyll tissue of Pinus needle is composed of
(a) Spongy parenchyma
(b) Armed parenchyma
(c) Chlorenchyma
(d) Transfusion tissue
Answer: (a)
3. Male gametophytes of Pinus is
(a) 2 celled
(b) 4 celled
(c) 6 celled
(d) 10 celled
Answer: (b)
4. This is how we can characterize the secondary wood of Pinus
(a) vessels are present
(b) resin ducts are absent
(c) resin ducts are present
(d) resin cells are present
Answer: (c)
5. This is a correct statement about Pinus
(a) forms deciduous trees in temperate areas
(b) exhibits xerophytic character and grows in deserts
(c) cosmopolitan in distribution
(d) is of economic value
Answer: (d)
6. Formation of non-motile male gametes is observed in
(a) Fern
(b) Pinus
(c) Funaria
(d) Selaginella
Answer: (b)
7. Winged seeds are present in
(a) Pinus
(b) Cycas
(c) Papaver species
(d) None of these
Answer: (a)
8. Meroblastic kind of embryo development occurs in
(a) Pinus
(b) Ferns
(c) Selaginella
(d) All of these
Answer: (a)
9. This is the best explanation for the pyramidal shape (excurrent) of Pinus (branches producing the appearance of a tall cone)
(a) influence of auxins on the development of stem tips
(b) water efficiently transported from ground to leaves
(c) adapting to wind pollination
(d) competition for sunlight amongst adjoining trees
Answer: (c)
10. These possess needle-like foliage leaves
(a) Pinus
(b) Fern
(c) Selaginella
(d) Mosses
Answer: (a)
