ALL INDIA SCHOLARSHIP TEST

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ATTEMPT ALL Q NO NEGATIVE MARKING

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In eukaryotic DNA replication the letters ORC are used to refer to which of the following? *

2 points

a) Original Replication Centre

b) Order Reorganization Complex

c) Origin Recognition Complex

d) Ordinary Recombination Centre

A non-anchorage dependent cell is host to a Baltimore Type V virus. If the cells are grown in the presence of carbon-14-labelled deoxyuridine triphosphate ([14C]-dUTP], which of the following statements are correct? Please select all that apply. *

2 points

a) Newly synthesized viral genomes will become radioactively labelled.

b) Newly synthesized mitochondrial genomes will become radioactively labelled.

c) Newly synthesized nuclear genomes will become radioactively labelled.

d) Radioactivity will not appear in newly synthesized virus or host genomes, nor in any of the RNA molecules synthesized by the host cell.

e) None of the statements are correct.

Which of the following is correct? *

2 points

a) Chloroplasts, like mitochondria and nuclei, have surrounding outer membranes that are perforated by porins.

b) All chloroplasts contain grana.

c) Chloroplast ribosomes can synthesize all chloroplast proteins.

d) Ribulose-1,5-bisphosphate carboxylase/oxygenase is concentrated in the stroma of chloroplasts.

Water passes into and out of cells through the ______. *

2 points

A) phospholipid bilayer

B) water carrier proteins

C) special water channel proteins

D) water receptor proteins

E) cell-recognition proteins

Which of the following statements is true? *

2 points

a) Kranz anatomy is seen in plants displaying crassulacean acid metabolism.

b) Photorespiration results from the efficient catalytic properties of ribulose-1,5-bisphosphate carboxylase/oxygenase (rubisco) in being able to catalyze two different reactions.

c) Malate produced in C4 metabolic plants is temporarily stored in the vacuole.

d) Photorespiration is dependent on the interconnected activities of chloroplasts, peroxisomes and mitochondria.

Which of the following groups of proteins associate with kinases and are synthesized and degraded at specific points during the cell cycle? *

2 points

a) Cyclins

b) Growth factors

c) Cyclin dependent kinases

d) Survival factors

The base adenine (A) of the DNA of the fungus Neurospora crassa forms 23.3 % of its composition. Which of the following is the most likely base composition of the genome, given C is cytosine, G guanine and T thymine? *

2 points

a) A = T = 23.3 % and G = C = 23.3 %

b) A = C = 26.7 % and G = T = 26.7 %

c) A = T = 23.3 % and G = C = 26.7 %

d) A = T = 26.7 % and G = C = 23.3 %

Pygmies are short because *

2 points

A) they do not produce enough growth hormone.

B) they produce too much growth hormone.

C) their plasma membrane growth hormone channel proteins cannot interact with the hormone.

D) their plasma membrane growth hormone carrier proteins cannot interact with the hormone.

E) their plasma membrane growth hormone receptors cannot interact with the hormone.

Which of the following statements are incorrect? Please select all that apply. *

2 points

a) The dark reactions of photosynthesis are alternatively known as the Calvin cycle.

b) Ribulose-1,5-bisphosphate carboxylase/oxygenase (rubisco) catalyzes the fixing of carbon dioxide to glycerate 3-phosphate.

c) The conversion of glycerate 1,5-bisphosphate to glyceraldehyde 3-phosphate in the Calvin cycle require ATP formed in the light reactions.

d) The conversion of ribulose 5-phosphate to ribulose 1,5-bisphosphate in the Calvin cycle requires the use of NADH formed in the light reactions

Which of the following statements are correct? Please select all that apply. *

2 points

a) Chlorophyll a differs from chlorophyll b in possessing an aldehyde group.

b) The maximum absorption of light by chlorophyll molecules occurs at wavelengths of approximately 420 and 660 nm.

c) Accessory pigments used in photosynthesis include carotenoids, xanthophylls and phylloquinone.

d) Photosynthesis is mainly driven by light of wavelengths 400-700 nm.

During splicing, which of the following snRNPs bind to a nucleotide sequence found in introns called the branch site. *

2 points

a) U1

b) U2

c) U4 and U6

d) U5

Which of the following are necessary for chromosome separation during anaphase? Please select all that apply *

2 points

a) Attachment of kinesin motor proteins to astral microtubules.

b) Cleavage of cohesin proteins.

c) Free energy from the hydrolysis of GTP.

d) Attachment of kinetochore microtubules to the centromeres of chromosomes.

The overall shape of a bacterial cell is determined by which of the following? *

2 points

a) Cytoskeleton

b) Cell wall

c) Nucleoid

d) Cell surface membrane

thistle tube containing a 5% sugar solution is covered at one end by a differentially permeable membrane and is placed in a beaker containing a 10% sugar solution. What will happen to the volume in the thistle tube? *

2 points

A) It will decrease in volume.

B) It will increase in volume.

C) It will remain the same.

D) It will initially decrease in volume and then increase.

E) It will initially increase in volume and then decrease.

How does a somatic cell that has just completed the S phase of its cell cycle compare in respect to its number of chromosomes and amount of DNA with a gamete of the same species? *

2 points

a) It has twice the number of chromosomes and twice the amount of DNA

b) It has the same number of chromosomes but twice the amount of DNA

c) It has twice the number of chromosomes and four times the amount of DNA.

d) It has four times the number of chromosomes and twice the amount of DNA

Apearing in JNU entrance exam or CSIR exam *

NAME *

How many hepatocytes would be produced by a series of four mitotic divisions that began with a single liver cell? *

2 points

a) 4

b) 8

c) 16

d) 32

CONTACT NO *

Pygmies are short because *

2 points

A) they do not produce enough growth hormone.

B) they produce too much growth hormone.

C) their plasma membrane growth hormone channel proteins cannot interact with the hormone.

D) their plasma membrane growth hormone carrier proteins cannot interact with the hormone.

E) their plasma membrane growth hormone receptors cannot interact with the hormone.

GMAIL ID *

Which of the following statements is correct? Please select all that apply. *

2 points

a) Classifying organisms on the basis of whether their cells have respective prokaryotic or eukaryotic structures is valid because this is a strong taxonomic character.

b) The cell surface membranes of both archaea and bacteria contain similar types of lipids.

c) The molecular biologies of archaea and eucarya show a greater proportion of similarities than those of eucarya and bacteria.

d) The last universal common ancestor most likely had a primitive prokaryotic cell organization.

PREFER CLASS WITH NOTES OR ONLY CLASS OR ONLY NOTES *

A(An) ______ protein in the plasma membrane carries out metabolic reactions. *

2 points

A) carrier

B) receptor

C) enzymatic

D) channel

E) cell-recognition

Which of the following statements is incorrect? *

2 points

a) A H+ gradient across the inner chloroplast membrane is necessary to form ATP during the light dependent reactions of photosynthesis.

b) The CF0CF1-ATPase of chloroplasts resembles the ATP synthase of inner mitochondrial membranes.

c) The CF0 subunit of the chloroplast ATPase is a H+-specific pore forming protein.

d) The CF1 subunit of the chloroplast ATPase is an ATP synthase.

The tobacco mosaic virus (TMV) genome contains approximately 27.4% adenine and 27.4%Thymin. Using this value, the percentages of the other three bases of the genome may be calculated. *

2 points

46% C+U

23% C+u

11.62 % C+u

21% C+u

None of the statements are correct.

Which of the following biomolecules are formed by condensation reactions? Please select all that apply. *

2 points

a) Polypeptides

b) Polysaccharides

c) Steroids

d) Nucleic acids

A thistle tube containing a 5% sugar solution is covered at one end by a differentially permeable membrane and is placed in a beaker containing a 10% sugar solution. What will happen to the volume in the thistle tube? *

2 points

A) It will decrease in volume.

B) It will increase in volume.

C) It will remain the same.

D) It will initially decrease in volume and then increase.

E) It will initially increase in volume and then decrease.

Msc passed or B.Sc *

CURRENT ADDRESS *

Caspases are involved in which of the following? *

2 points

a) Atrophy

b) Necrosis

c) Apoptosis

d) Accidental cell death

Apoptosis involves which of the following? Please select all that apply. *

2 points

a) Lysis of the cell with loss of components to the surrounding tissues that induce an inflammatory response.

b) Hydrolysis of DNA by a specific endonuclease.

c) Control is exerted by specific cell signalling pathways.

d) Involvement of the pro-apoptotic protein Bcl.

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