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TLS Online TPP Program

#Question id: 4818

Researchers found a strain of E. coli bacteria that had mutation rates one hundred times higher than normal. Which of the following statements correctly describes the most likely cause of these results?

#Unit 3. Fundamental Processes

  1. The single-strand binding proteins were malfunctioning during DNA replication.

  2. There were one or more base pair mismatches in the RNA primer.

  3. The proofreading mechanism of DNA polymerase was not working properly.

  4. The DNA polymerase was unable to add bases to the 3′ end of the growing nucleic acid chain.

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TLS Online TPP Program

#Question id: 27510

#Unit 2. Cellular Organization

As the time passes during the nucleosome assembly then, which of the following fig. is correctly representing the different state of circular DNA
TLS Online TPP Program

#Question id: 27511

#Unit 2. Cellular Organization

Which of the following is true when a Intercalation of ethidium ion into the DNA takes place

a. It unwind the two base pair by 260

b. Reduces the normal rotation per base pair from 360 to 100

c. Increases the normal rotation per base pair from 100 to 360

d. It first removes the negative supercoils and then introduces positive supercoils
TLS Online TPP Program

#Question id: 27512

#Unit 2. Cellular Organization

If a B-DNA having superhelical density  is -0.05 and the value of LK = 200, then what will be the length of DNA
TLS Online TPP Program

#Question id: 27513

#Unit 2. Cellular Organization

Which of the following chemical reagent is used to measure the effect of nicking the DNA
TLS Online TPP Program

#Question id: 27514

#Unit 2. Cellular Organization

Which of the following Histone is involved in stimulates formation of the 30 nm fiber
TLS Online TPP Program

#Question id: 27530

#Unit 1. Molecules and their Interaction Relevant to Biology

Match the Group 1 with appropriate solution of Group 2

Group 1                                                  Group 2

(1) Agar                                               (P)  Plant cell wall

(2) Raffinose                                       (Q)  Trisaccharides 

(3) Cellulose                                       (R)  Xanthomonas Compestris

(4) Xanthum Gum                             (S) seaweeds