In order to quantify unknown DNA templates, a standard dilution is prepared using DNA of known concentration. As the DNA accumulates during the early exponential phase of the reaction,an arbitrary point is taken where each of the diluted DNA samples cross. This is termed as_____

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#Question id: 2202

#XL - Q Biochemistry

The distribution of K⁺ across an artificial membrane was measured, and the concentrations were found to be equal on both sides. Which of the following statements is true about the distribution of K⁺?

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#Question id: 2204

#XL - Q Biochemistry

A mutant channel protein is expressed in an oocyte. Compared to patch clamping experiments in oocytes expressing the normal channel, the length of downward deviations is diminished by half. This indicates:

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#Question id: 2205

#XL - Q Biochemistry

Amino acid entry into cells can occur via uniporters or symporters. If the rate of leucine entry into the cell increases when the pH decreases, this suggests:

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#Question id: 2207

#XL - Q Biochemistry

Why was it unexpected that transporter proteins are required for transmembrane fatty acid transport?

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#Question id: 2208

#XL - Q Biochemistry

Which of the following statements is a reasonable explanation for why unsaturated fatty acids help keep a membrane more fluid at lower temperatures?

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#Question id: 2210

#XL - Q Biochemistry

Which of these is a general feature of the lipid bilayer in all biological membranes?