Answer:
This question is incomplete, here is the complete question:
For a certain insecticide, the LD-50 dosage level for rats is determined to be 250 milligrams per kilogram of body mass. On the basis of this information, which of the following is the best prediction regarding the consequences of receiving this dosage of the insecticide?
a) Fifty percent of any rat population would be sickened
b) Fifty percent of the population of any warm-blooded animal would die
c) Fifty percent of any population of mosquitoes would die
d) Five hundred out of every one thousand people would experience acute effects
e) Five hundred out of every one thousand rats would die
Explanation:
The LD-50 dosage is normally used in toxicology assays and is known as the median lethal dose of a compound (toxins or pollutants for example). This value represents the quantity of a substance that is required to kill fifty percent of a given population that is under a test for a fixed period of time.
The units in which the LD50 is usually expressed are mass of toxic compound administered per unit body mass of the organisms that is tested (milligrams of substance per kilogram of body weight)
Based on the concepts explained before and on the information provided by the question, the best prediction is e. Five hundred out of every one thousand rats would die
. This is true because the statement refers to the correct specie for which the LD-50 dosage was estimated (rats), express the correct percentage of individuals (fifty percent of one thousand is five hundred) and the proper consequences (death).
Answer:In DNA and protein hydrogen, sulphur, oxygen and selenium are some elements which found in DNA and protein.
Explanation:
This elements are helps in preparing of amino acid.
The Laws of gravitation was given by Isaac Newton.
The vaccine was discovered by Edward Jenner (discovered vaccine for smallpox).
The atomic theory was given by John Dalton.
The Laws of motion was given by Isaac Newton.
The theory of spontaneous generation was given by Louis Pasteur.
The disease causing bacteria were discovered by Louis Pasteur.
Answer:
Each FADH2 yields about 1.5 ATP via oxidative phosphorylation.
Explanation:
Most of the ATP molecules are produced by oxidative phosphorylation, not by substrate-level phosphorylation. During glycolysis, 2 ATP molecules per glucose are produced by substrate-level phosphorylation. Similarly, Kreb's cycle also yields 2 ATP per glucose by substrate-level phosphorylation.
For each pair of electrons transferred to O2 from FADH2 via electron transport chain, 4 and 2 protons are pumped from matrix towards the intermembrane space by complex III and complex IV respectively. It generates the proton concentration gradient required to drive the synthesis of 1.5 ATP molecules. Since oxidation of FADH2 is coupled to the phosphorylation of ADP to form ATP, the process is called oxidative phosphorylation.