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TLS Online TPP Program

#Question id: 381

Consider an acetate buffer, initially at the same pH as its pKa (4.76). When sodium hydroxide (NaOH) is mixed with this buffer, the:

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. pH rises more than if an equal amount of NaOH is added to an acetate buffer initially at pH 6.76

  2. pH rises more than if an equal amount of NaOH is added to unbuffered water at pH 4.76.

  3. ratio of acetic acid to sodium acetate in the buffer falls.

  4. sodium acetate formed precipitates because it is less soluble than acetic acid.

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TLS Online TPP Program

#Question id: 766

#Unit 1. Molecules and their Interaction Relevant to Biology

With respect to microRNAs, which, if any, of the following statements, is true?
TLS Online TPP Program

#Question id: 765

#Unit 1. Molecules and their Interaction Relevant to Biology

miRNA plays a role in transcriptional and post transcriptional regulation by which of the following
TLS Online TPP Program

#Question id: 762

#Unit 1. Molecules and their Interaction Relevant to Biology

Regarding the sugar residues in nucleic acids, which, if any, of the following statements is incorrect?
TLS Online TPP Program

#Question id: 759

#Unit 1. Molecules and their Interaction Relevant to Biology

The Watson and Crick structure of DNA refers to:
TLS Online TPP Program

#Question id: 755

#Unit 1. Molecules and their Interaction Relevant to Biology

Enzymes that regulate the process of supercoiling termed as;
TLS Online TPP Program

#Question id: 752

#Unit 1. Molecules and their Interaction Relevant to Biology

The A260/A280 ratio of a double-stranded DNA sample can be used to assess its purity. The value for the pure DNA is ----------------