bio test ch 8 JN

32% of the bases in a strand of DNA are T. What percentage would be C?

• 22%
• 18

• 44%
• 56%

12% of the bases in a strand of DNA are T. What percentage would be A?

• 12%

• 33%
• 34%
• 66%

The lac operon is inducible. What is meant by inducible?

• Can be turned off

• Usually on

• Usually off

• Can be turned on

The trp operon is repressible. What is meant by repressible?

• Can be turned off

• Usually on

• Usually off

• Can be turned on

When would a bacteria cell want to shut off the production of tryptophan?

• No tryptophan present

• Too little tryptophan

• Sufficient amount of tryptophan

When would a bacteria cell want to shut off the production of lac enzymes?

• No lactose present

• Too much lactose

• Sufficient amount of lactose present

What type of mutation would occur from the following mutation?

• Missense

• Nonsense

• Silent

• Frameshift

What type of mutation would occur from the following mutation?

• Missense

• Nonsense

• Silent

• Frameshift

What type of mutation would occur from the following mutation?

• Missense

• Nonsense

• Silent

• Frameshift

DNA helicase

• coding part of an mRNA sequence
• unzips the double helix of DNA so that replication can occur
• noncoding sequence in mRNA that is cut out in processing