The first genes on Earth were probably -triyambak.org

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#Question id: 4947

The first genes on Earth were probably

#XL - S Microbiology

DNA produced by reverse transcriptase from abiotically produced RNA.
DNA molecules whose information was transcribed to RNA and later translated in polypeptides.
auto-catalytic RNA molecules.
RNA produced by autocatalytic, proteinaceous enzymes.

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#Question id: 371

#XL - Q Biochemistry

How many milliliters of a 2.0 M solution of boric acid must be added to 600 mL of a solution of 10 mM sodium borate in order for the pH to be 9.45? (pKa of boric acid = 9.24)

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#Question id: 372

#XL - S Microbiology

Carbon dioxide in the atmosphere dissolves with the raindrops. The pH of raindrops is ________.

TLS Online TPP Program

#Question id: 372

#XL - Q Biochemistry

Carbon dioxide in the atmosphere dissolves with the raindrops. The pH of raindrops is ________.

TLS Online TPP Program

#Question id: 373

#XL - S Microbiology

What is the hydroxyl ion (OH-) concentration of a solution of pH 8?