Well, MOST pathogenic bacteria is harmless, but SOME could cause death, like tuberculosis, but just in case you would want to mark the answer as, "True".
I hope I helped! =D
Answer:
A. Glucose:
As lactose is absent will follow the glucose metabolism, so the lac repressor will hold tightly with the operator which leads to the prevention of transcription as RNA polymerase can not bind to promoter so no lactose metabolism.
B. lactose:
In the case or wild mutant lactose metabolism will occur as lactose is present, allolactose binds to the lac repressor thus the operator and promoter are free so transcription starts. The same result will be in all test except in the case of a mutant repressor.
C. glucose and lactose:
In this case, diauxic growth will occur. This growth takes place when two sugars are present in the media. The preferred sugar will be consumed first That is glucose. Then a lag phase will come which will be followed by the second sugar metabolism that is lactose. the given two cases :
Lactose will be metabolized first, as operator site mutation prevents repressor protein binding and thus will lead to the constitutive synthesis of lac operon in test B.
The same thing will happen, as in this case also, constitutive synthesis of lac operon will happen in test C.
Cultures grown in the presence of both glucose and lactose are metabolizing lactose. In the test (b) and (c) will be responsible due to constitutive synthesis of lac operon will happen.
Answer:
C) Protein synthesis is the process through which cells read DNA and build the molecular components of new cells.
Explanation:
DNA is the genetic material of the organisms. It stores the genetic information used to make the molecules and other components required for the new cells. This process of formation of molecules is called protein synthesis. During protein synthesis, The DNA forms a complementary messenger RNA (mRNA) in the nucleus of a cell. Synthesis of mRNA from DNA is called transcription. The mRNA released into the cytoplasm where codons on mRNA sequence translate into a polypeptide or protein molecules by linking a chain of amino acids by peptide bonds.
Answer:
Air temperature: Ice, tree rings
Ocean temperature: Chemical isotopes in foraminifera
Carbon dioxide levels: Ice
Kinds of plants: Fossilized pollen grains
Rainfall: Tree rings
Explanation:
These are the correct answers.
