Answer:
Definition. The first metaphase of meisosis I encompasses the alignment of paired chromosomes along the center (metaphase plate) of a cell, ensuring that two complete copies of chromosomes are present in the resulting two daughter cells of meiosis I. Metaphase I follows prophase I and precedes anaphase I.
Explanation:
The ATP required for continuous muscle contraction during endurance activities comes from anaerobic respiration and oxidative phosphorylation.
<h3>What is anaerobic respiration? </h3>
The process of breakdown of substrate glucose in the absence of oxygen is called anaerobic respiration. This process primarily takes in some unicellular organisms.
In humans, during endurance activities, a continuous supply of ATP is required. The ATP reserves in muscles are very small. Thus, there is a requirement for metabolic pathways to maintain continuous ATP supply and resynthesis.
These pathways are phosphocreatine breakdown and muscle glycogen breakdown which enable anaerobic substrate level phosphorylation and aerobic phosphorylation.
Therefore, the ATP required for continuous muscle contraction during endurance activities comes from anaerobic respiration and oxidative phosphorylation.
Read more about anaerobic respiration, here
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Answer:
D. The methyl group of acetyl CoA becomes radio-labeled
Explanation:
During the steps in glycolysis, the carbon at position 1, becomes C-1 in dihydroxyacetone phosphate during the cleavage of fructose-1,6-bisphosphate to dihydroxyacetone phosphate and glyceraldehyde-3-phosphate. Subsequently on isomerization of dihydroxyacetone phosphate to glyceraldehyde-3-phosphate, C-1 of dihydroxyacetone phosphate becomes C-3 of glyceraldehyde-3-phosphate.
Furthermore, in pyruvate, the end product of glycolysis, C-3 is converted to a methyl group which then becomes the methyl group in the acetyl-CoA molecule produced from the oxidative decarboxylation of pyruvate.
Since the radioactive 14-C of radio-labeled glucose occupies position 1, it will become the methyl group of acetyl-CoA.
Answer mad cow disease
Explanation:
100% case mortality rate
Humans may acquire the disorder by eating diseased meat products. When it comes from cattle, the disorder is called Creutzfeldt-Jakob disease and ultimately leads to dementia and death. The condition is rare.
The disease is marked by rapid mental deterioration, usually within a few months. Most people eventually lapse into a coma.
Treatment focuses on keeping the person as comfortable as possible.
Overpopulation will result in less food, water, and shelter for all species in the web. if overpopulation is happening higher on the food web, all of their food sources connected to them will begin to lessen, endangering the sources and other competitors who eat the similar things.
