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Q. No.Regarding the naming of restriction enzymes:
I:
The enzyme names begin with an italicized three-letter acronym; the first letter of the acronym is the first letter of the genus of bacteria from which the enzyme was isolated, the next two letters are the two letters of the species.
II:
These are followed by extra letters or numbers to indicate the serotype or strain, a space, then a Roman numeral to indicate the chronology of identification.
1.
Only I is correct
2.
Only II is correct
3.
Both I and II are correct
4.
Both I and II are incorrect
Subtopic: Restriction Enzymes - Main Enzymes |
83%
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The palindrome in DNA is a sequence of base pairs:
| 1. | that reads same on the two strands when orientation of reading is kept the same. |
| 2. | that reads same on the two strands when orientation of reading is 5’ to 3’ on one end and 3’ to 5’ on the other. |
| 3. | that are complementary on the two strands when orientation of reading is kept the same. |
| 4. | that are complementary on the two strands when orientation of reading is 5’ to 3’ on one end and 3’ to 5’ on the other. |
Subtopic: Restriction Enzymes - Main Enzymes |
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The number of correct statements regarding cloning vectors amongst the given statements is:
| I. | Bacteriophages because of their high number per cell, have very high copy numbers of their genome within the bacterial cells. |
| II. | If one wants to recover many copies of the target DNA, it should be cloned in a vector whose origin supports high copy number. |
| III. | A selectable marker helps in identifying and eliminating non-transformants and selectively permits the growth of the transformants. |
| IV. | Ti plasmid of Agrobacterium tumefaciens has now been modified into a cloning vector which is no more pathogenic to the plants but is still able to use mechanisms to deliver genes of our interest into a variety of plants. |
| V. | Retroviruses in animals have the ability to transform normal cells into cancerous cells and hence can never be used as a cloning vector in rDNA procedures. |
| 1. | 2 | 2. | 3 |
| 3. | 4 | 4. | 5 |
Subtopic: Cloning Vector |
67%
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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the most appropriate answer from the options given below :
| Assertion (A): | In order to link the alien DNA, the vector needs to have very few, preferably single, recognition sites for the commonly used restriction enzymes: |
| Reason: (R): | Presence of more than one recognition sites within the vector will generate several fragments, which will complicate the gene cloning. |
| 1. | Both (A) and (R) are True and (R) explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) does not explain (A). |
| 4. | Both (A) and (R) are False. |
Subtopic: Cloning Vector |
93%
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What temperature is used to give heat shock when competence is induced in a bacterial host cell enabling it to take up rDNA?
| 1. | 27°C | 2. | 42°C |
| 3. | 72°C | 4. | 98°C |
Subtopic: Transforming Plant & Animal Cell |
78%
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Identify the correct statement:
| 1. | DNA is the genetic material of all organisms without exception. |
| 2. | As it is an RNA world, the genetic material is ds RNA in majority of the organisms. |
| 3. | Since the DNA is enclosed within the membranes, we have to break the cell open to release DNA along with other macromolecules. |
| 4. | Proteins such as histones can be removed from the cell lysate with the help of ribonuclease. |
Subtopic: Process of Biotech |
77%
From NCERT
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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the most appropriate answer from the options given below :
| Assertion (A): | Agar gel electrophoresis is employed to check the progression of a restriction enzyme digestion. |
| Reason (R): | Restriction enzyme digestion is performed by incubating purified DNA molecules with the restriction enzymes, at the optimal conditions for that specific enzyme. |
| 1. | Both (A) and (R) are False. |
| 2. | Both (A) and (R) are True but (R) does not explain (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True and (R) explains (A). |
Subtopic: Process of Biotech |
56%
From NCERT
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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the most appropriate answer from the options given below :
| Assertion (A): | Bioreactors are important in biotechnology procedures to obtain desired products. |
| Reason (R): | Bioreactor provides the optimal conditions for achieving the desired product by providing optimum growth conditions |
| 1. | Both (A) and (R) are False. |
| 2. | Both (A) and (R) are True and (R) explains (A). |
| 3. | Both (A) and (R) are True but (R) does not explain (A). |
| 4. | (A) is True but (R) is False. |
Subtopic: Bioreactors/Downstream Processing |
92%
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To obtain DNA in pure form, the enzyme that should never be used to hydrolyse biomolecules in a cell lysate, will be:
| 1. | Lysozyme or Chitinase | 2. | DNase |
| 3. | DNAs | 4. | Proteases |
Subtopic: Process of Biotech |
76%
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Primers used in PCR are:
| 1. | a complementary DNA sequence synthesised on the template of hnRNA |
| 2. | artificially synthesised or sequences used to induce replication of DNA |
| 3. | a single-stranded sequence of DNA or RNA used to search for its complementary sequence in a sample genome |
| 4. | small chemically synthesised oligonucletides that are complementary to the regions of DNA |
Subtopic: Polymerase Chain Reaction: PCR |
73%
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