The correct answer is (A and E) The operator region where the mutation occurs and the operator does not binds to the repressor normally.The mutation can also occur in the Lacl gene which leads to an inactive lac repressor.
- The lacI gene helps in regulation of lac operon. It is also responsible for the metabolism of lactose in bacteria.
- The mutation could have occured in the operator region, where after mutation the repressor would not be able to bind to operator.
Answer:
<em>The correct option is D) The four nitrogen bases of DNA combine is threes to produce only 20 amino acids.</em>
Explanation:
Our DNA is made up of four nucleotide bases. The genetic codon can produce 20 different amino acids based on the sequence. The genetic code which codes for a certain amino acid remains the same for all types of organisms whether be prokaryotes, animals or plants. Hence, the genetic code is considered universal as the four nitrogen bases combine to form only the 20 different amino acids in all types of organisms alive.
Answer:
Is carbon dioxide needed for photosynthesis?
1. Destarch the plant (remove previously made starch from plant)
2. a. cut the leaf in 2
b. 1 part in a box with CO2 absorber and 1 part in box with a CO2 provider
3. Test for starch (BEWI)
B E W I
1. Put leaf in boiling water to destroy the cell membrane and denature enzymes
2. Ethanol in a hot water bath to remove chlorophyll
3. Warm water to soften the leaf
4. Add drops of iodine solution
Explanation:
The correct answer that would best complete the given statement above would be option A. <span>Studies of healthy people indicate that functioning of the human body remains essentially constant until the age of 70 or about 70 years old. Hope this answers your question. </span>
A type of cell death in which the cell uses specialized cellular machinery to kill itself