Question

**A polymerase chain reac6on (PCR) ampli?es a speci?c DNA sequence up to a billion-fold. (true/false)

**In discussing the control of enzyme transcrip6on, it is essen6al to consider the cell's environment.(true/false)

**Proteins are needed in the cell at about the same level under all growth condi6ons.(true/false)

**In catabolic repression, cells use the least abundant carbon source ?rst. (true/false)

Answer 1

The answers should be as follows

A1) TRUE as this reaction amplifies the fragment of DNA that is required.

A2)TRUE because the transcription is also affected by the environment of the cell.

A3)FALSE as level of proteins changes with the change in growth conditions as different proteins are required for different conditions.

A4) FALSE as in this condition, cell uses the most easily consumed carbon source compound.

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