A. | During open heart, surgery blood is circulated in the heart-lung machine. |
B. | Blockage in coronary arteries X-ray by angiography. |
C. | Computerized Axial Tomography (CAT) shows a detailed internal structure as seen in a section of the body. |
D | X-ray provides clear and detailed images of organs like prostate glands and lungs. |
1. B and D
2. C and D
3. A and C
4. A and B
Consider the following statements :
I. | RNAi takes place in all eukaryotic organisms as a method of cellular defence |
II. | It involves silencing of a specific mRNA due to complementary dsDNA molecules that prevents the translation of mRNA |
III. | Fire and Mello got Nobel Prize for the discovery of RNAi |
Which of the above statements are true ?
1. I and II only
2. I and III only
3. II and III only
4. I,II and III
Match the organism with its use in biotechnology.
(a) | Bacillus thuringiensis | (i) | Cloning vector |
(b) | Thermus aquaticus | (ii) | Construction of first rDNA molecule |
(c) | Agrobacterium tumefaciens | (iii) | DNA polymerase |
(d) | Salmonella typhimurium | (iv) | Cry proteins |
Select the correct option from the following:
(a) | (b) | (c) | (d) | |
1. | (iv) | (iii) | (i) | (ii) |
2. | (iii) | (ii) | (iv) | (i) |
3. | (iii) | (iv) | (i) | (ii) |
4. | (ii) | (iv) | (iii) | (i) |
Match the following columns and select the correct option.
Column-I | Column-II | ||
a. | Bt cotton | (i) | Gene therapy |
b. | Adenosine deaminase deficiency | (ii) | Cellular defense |
c. | RNAi | (iii) | Detection of HIV infection |
d. | PCR | (iv) | Bacillus thuringiensis |
a | b | c | d | |
1. | (iii) | (ii) | (i) | (iv) |
2. | (ii) | (iii) | (iv) | (i) |
3. | (i) | (ii) | (iii) | (iv) |
4. | (iv) | (i) | (ii) | (iii) |
Given below are a few statements regarding somatic hybridization. Choose the correct statements.
I. | Protoplasts of different cells of the same plant are fused. |
II. | Protoplasts from cells of different species can be fused. |
III. | Treatment of cells with cellulase and pectinase is mandatory. |
IV. | The hybrid protoplast contains characters of only one parental protoplast. |
1. I and III
2. I and II
3. I and IV
4. II and III
With regard to insulin, choose the correct options:
a: | C-peptide is not present in mature insulin. |
b: | The insulin produced by rDNA technology has C-peptide. |
c: | The pro-insulin has C-peptide. |
d: | A-peptide and B-peptide of insulin are interconnected by disulphide bridges. |
1. | (a), (c) and (d) only | 2. | (a) and (d) Only |
3. | (b) and (d) only | 4. | (b) and (c) only |
Give below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): | In human beings, insulin is synthesized as a pro-hormone which needs to be processed before it becomes fully mature and functional. |
Reason (R): | The extra stretch of C-peptide is to be removed from A and B peptide chain of insulin. |
In the light of the above statements, Choose the most appropriate answer from the option given below :
1. | (A) is correct but (R) is not correct. |
2. | (A) is not correct but (R) is correct. |
3. | Both (A) and (R) are correct and (R) is the correct explanation of (A). |
4. | Both (A) and (R) are correct but (R) is not the correct explanation of (A). |
Statement I: | Bacillus thuringiensis forms protein crystals which contain a toxin that kills certain insects but not Bacillus because Bt toxin protein exists as inactive protoxins in Bacillus. |
Statement II: | Bacillus thuringiensis forms protein crystals which contain a toxin that kills certain insects but not Bacillus because toxin requires alkaline pH available in the gut of insects and which solubilises the crystals in order to convert into an active form. |