Answer:
Topoisomerase
Explanation:
Topoisomerases are enzymes that produce changes in the topology of the DNA during replication, transcription, traduction, or reparation processes. They can cut one or both strands and in order to relieve torsional stresses in the supercoiled structure of DNA. With this, they help to maintain the chromosome's integrity. There are two types of topoisomerases: topoisomerase I (it cuts only one strand of DNA) and topoisomerase II (it is able to cut both strands of DNA).
Answer:
(D) acetyl CoA, NADH, H+, and CO2.
Explanation:
The given explanation is about oxidative decarboxylation of pyruvate into acetyl CoA and carbon dioxide. The reactions are catalyzed by enzyme complex pyruvate dehydrogenase. During the reaction, pyruvate loses one of its carbon atoms in the form of CO2 and the rest of two carbons form the acetate which in turn combines with CoA to form the acetyl CoA.
Since it is an oxidative decarboxylation, the released electrons are accepted by NAD+ which in turn is converted into NADH + H+.
Overall, there is the formation of one molecule of acetyl-CoA, CO2 and NADH + H+ each from one molecule of pyruvate.
Carbon is the sixth most abundant element in the planet. Without carbon, life will be non-existent. It provides the framework for all living organisms on Earth. A carbon atom is composed of six protons and six neutrons. Carbon is found in almost everything that surrounds us; they are in fuels, coals, natural gas, even the proteins that make-up hair and meat contain carbon. This is mainly because carbon atoms can bond to other carbon atoms to make a compound. It is naturally found in the environment and its abundance fits its purpose in our existence. <span>A Carbon atoms can bond to other carbon atoms.</span>
Spindle fibers attach to the sister chromosomes and pull them apart. without them, the sisters would still be attached to each other which means there would be no division.