Which of the following enzymes is the principal replication enzyme in E. coli?

If the coli form bacteria is present in a sample of water, then the coli-form test to be conducted is
(i) Presumptive coli-form test
(ii) Confirmed coli-form test
(iii) Completed coli-form test

A

Only (i)

B

Both (i) and (ii)

C

Both (i) and (iii)

D

All (i), (ii) and (iii)

Which among the following statements regarding filing Rejoinder/Replication in a suit, as per the Code of Civil Procedure 1908, are correct?
1. Rejoinder/ Replication is filed as a matter of Right
2. Provision of filing Rejoinder/ Replication is contained under Order VIII of the Code of Civil Procedure
3. Rejoinder/Replication may be filed only after due permission of the Court.
4. Rejoinder/Replication is a part of pleading.
Select the correct answer:

A

1, 3 and 4

B

1, 2 and 3

C

2 and 4 only

D

2, 3 and 4

Consider the following statements Enzymes and proteins can be correlated with each other in the following ways.
1. All proteins are enzyme.
2. All enzymes are protein.
3. All enzymes are not protein.
4. All proteins are not enzyme.
Which of the statements given above is/are correct?

A

1 and 3

B

2 and 4

C

1, 2 and 3

D

2, 3 and 4

In the following sentence the word principal' occurs three times "The principal (1) aim of the principal (2) of the college was to help build new roads to link the area's principal (3)schools" Indicate the use(s) in which the meaning of the word “Principal is ‘chief or main',

A

Use (1)

B

Use(2)

C

Use (3)

D

Both (1) & (3)

Replication can also be carried out by rolling circle replication. Choose the correct statement for this type of replication?

A

It can be used for the formation of RF

B

The product of gene III binds on a specific site of double stranded genome

C

It creates a nick in the – strand generating a free 3’ hydroxyl

D

This strand is extended by the polymerase and displaces the original – strand

Statement 1: Enzyme reaction is dependent of concentration on enzyme only and not substrate. Statement 2: Do enzymes catalase and peroxidase show residual enzyme activity?

A

True, False

B

True, True

C

False, False

D

False, True

Which enzyme is used for the process of replication in E. Coli?

A

Restriction enzyme

B

Protease enzyme

C

Lipase enzyme

D

DNA polymerase

Consider the following statements regarding DNA replication and choose the correct answer:
1. The very first requirement of DNA synthesis is the presence of a template or plan along which the new strand is to be constructed
2. The second requirement is of a DNA-dependent-DNA polymerase or simply DNA polymerase enzyme
3. A DNA Pol cannot join two free nucleotides; one of them must be anchored by hydrogen bonds to a DNA strand
4. Replication takes place bidirectionally

A

1, 2, 3 and 4 are true

B

Only 2 and 4 are true

C

Oniy 2, 3 and 4 are true

D

Only 1 and 2 are true

Consider the following statements and choose the correct answer:
In order to be a useful vector, a plasmid:
1. Must possess the genes essential for replication of DNA
2. Must carry, at least, one gene that can be used as a marker for the selection of the plasmid in the transformed cell
3. Must include, at least, one gene recognizable by its product or activity, which possesses within it a cutting site for a restriction enzyme
4. In the rep region must contain a cutting site for the restriction enzyme to be used

A

Only 1, 2 and 3 are true

B

1, 2, 3 and 4 are true

C

Only 3 and 4 are true

D

Only 2 and 4 are true

Escherichia coli (E.coli) এর জন্য কোনটি সঠিক নয়?

A

এরা অন্ত্রে ভিটামিন B উৎপন্ন করে

B

এরা সাধারনত কোনো রোগ তৈরি করে না

C

কিছু প্রজাতি শিশুর ডায়রিয়া রোগ সৃষ্টি করে

D

পানি ও খাবারের উপস্থিতি মল দ্বারা দূষণ নিদের্শ করে

Which of the following enzymes is the principal replication enzyme in E. coli?

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