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#Question id: 798

Match the structural properties of DNA with the respective types of DNA in which they are found.

               COLUMN – I                                             COLUMN – II

A.        Pitch per turn of helix                                     1. 45.6 angstrom                   

                                                                                      2. 24.6 angstrom                               

 3. 33.2 angstrom

B.        Helix packing diameter                                 1. 23.7 angstrom            

                                                                                     2. 18.4 angstrom            

3. 25.5 angstrom

C.        Major-groove proportions                            1. Flattened out on helix surface

                                                                                      2. Extremely narrow but very deep

 3. Wide and of intermediate depth

D.        Minor-groove proportions                            1. Very broad but shallow

                                                                                     2. Extremely narrow but very deep

                                                                                    3. Narrow and of intermediate depth

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. A DNA – A-2; B-3; C-2; D-1

  2. B DNA – A-3; B-2; C-3; D-3

  3. Z DNA – A-1; B-2; C-1; D-2

  4. A DNA – A-2; B-2; C-3; D-2

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#Question id: 10476

#Unit 1. Molecules and their Interaction Relevant to Biology

Following statements are regarding to gangliosides.

A. They are ceramides with attached oligosaccharides that include at least one sialic acid residue.

B. They are ceramides with attached oligosaccharides that include at least one phasphatidic acid residue.

C. Sialic acid gives gangliosides the negative charge at pH 7 that distinguishes them from globosides.

D. Gangliosides are primarily components of cell-surface membranes and constitute a significant fraction (6%) of brain lipids.

Which of the following combination is correct?
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#Question id: 1868

#Unit 4. Cell Communication and Cell Signaling

Which of the following is NOT helpful in the diagnosis of AIDS?
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#Question id: 10562

#Unit 6. System Physiology – Plant

The direction and rate of water flow across a membrane are determined by
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#Question id: 12641

#Unit 6. System Physiology – Plant

 Among the diverse components of plant defense arsenals are proteins that interfere with herbivore digestion, Given some defense compound of plants in column I with its given action in column II

Column I

column II

I)  α-amylase inhibitors

a) Antidigestive proteins, block the action of herbivore proteolytic enzymes. After entering the herbivore’s digestive tract, they hinder protein digestion by binding tightly and specifically to the active site of protein-hydrolyzing enzymes such as trypsin and chymotrypsin

II) Lectins

b) block the action of the starch-digesting enzyme

III) proteinase inhibitors

c) A defensive proteins that bind to carbohydrates or carbohydrate-containing proteins. After being ingested by an herbivore, bind to the epithelial cells lining the digestive tract and interfere with nutrient absorption
Correctly match the defence compound withits action on herbivore;
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#Question id: 2297

#Unit 2. Cellular Organization

Which structure is composed of phospholipids and regulates the movement of substances in and out of cells?