How does lactose get into a bacterial cell? (Choose the ONE best answer) it is p

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How does lactose get into a bacterial cell? (Choose the ONE best answer) it is permeable to the plasma membrane it passes through a lactose ?channel? it binds to a chaperone and passes through a nuclear pore Question 6 What else can bacteria (such as E. coli) use sugars for besides energy? (Choose ALL correct answers) carbon source to build amino acids carbon source to make vitamins sulfur source for making cysteine (an amino add) nitrogen source for making a nucleic acid?s base Question 7 To effectively regulate when genes get transcribed regulator proteins need to.. bind to ribosomes . bind to DNA bind to mRNA bind to (RNA

Explanation / Answer

5. b it passes through a lactose channel. The membrane protein latose permease allows lactose to be transported into the cell.IT is a symporter and uses proton gradient to transport lactose in the same direction as the proton gradient.

6. a and b. Sugars meaning carbohydrates can act as a carbon source in the synthesis of amino acids and vitamins.

7. Bind to DNA. They need to bind to the operator segment of the operon or gene and prevent the binding of RNA polymerase. Then only transcription of the gene is stopped.

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