Options for part A are as follows:
A) A mutation in the operator sequence
B) A mutation in the lac-Z gene
C) A mutation in the lac-Y gene
D) A super repressor mutation
Answer:
The correct answer:
Part a - A mutation in the operator sequence
Part b - It ensures that a cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment
Part C. true.
Explanation:
part a:
If there is a mutation in the operator sequence leads to prevent binding of the repressor which leads to allowing constitutive expression of the genes various conditions.
part b:
The biological role of the lac operon makes sure that the cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment
Part c:
RNA polymerase cannot transcribe the structural genes due to the repressor binds to the lac operator, therefore, the proper function of the lac operon is possible when the placement of the operator sequence between the promotor and the structural genes.
<h3><u>
Answer;</u></h3>
-The name of the general was Leslie Richard Groves Jr. He Graduated fourth in his class<u><em> in the U.S. Military Academy at West point.</em></u>
<h3><u>
Explanation;</u></h3>
- <u>The name of the general was Leslie Richard Groves Jr. He graduated from the United States Military Academy of West point in the year 1918.</u>
- As an engineering aide, He led a small team of workers who helped produce the exterior casing of "Fat Man," a nuclear bomb dropped on Nagasaki, Japan, that hastened the Japanese unconditional surrender three weeks later.
Answer: Option A) Exocytosis
Explanation:
Unlike the other pathways mentioned, exocytosis involves the outward movement of outside the cells. This is vital in the removal of waste products generated within the cell.
Thus, exocytosis is the answer because it expels materials out of the cell, rather than deliver materials to lysosomes
The most likely consequence of the widespread lack of bees is loss or reduction of food. Majority of food depends on pollination and bees are major pollinators in the ecosystem, playing an essential role in food production among different type of plants. Bee’s declining population is mostly associated to excessive use of pesticides or toxicants in industrial agriculture as well as presence of different parasites or pathogens and even climate change.
Paleontology is the study of the history of life on earth as based on fossils.
