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TLS Online TPP Program

#Question id: 35135

Which of the following statements is/are correct about point mutations ? 

#XL - S Microbiology
  1. Transition and Transversion both are a type of a point mutation.
  2. Treatment of DNA with nitrous acid cause point mutation.
  3. Cytosine is  converted to uracil is an example of point mutation.
  4. Point mutation is a type of induced mutation.
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TLS Online TPP Program

#Question id: 2200

#XL - Q Biochemistry

A neurotransmitter that binds to a postsynaptic cell and opens K+ channels:
TLS Online TPP Program

#Question id: 2201

#XL - Q Biochemistry

Much of what we know about the nicotinic acetylcholine receptor has come from studies of:
TLS Online TPP Program

#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+?
TLS Online TPP Program

#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:
TLS Online TPP Program

#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:
TLS Online TPP Program

#Question id: 2207

#XL - Q Biochemistry

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