In cellular respiration ________ reactions produce most of the total ATP that is generated.
anaerobic
anabolic
aerobic
None of the Correct answers are correct.
The Correct Answer is C
A. anaerobic: Anaerobic respiration, such as glycolysis, occurs without oxygen and produces only a small amount of ATP, typically 2 ATP per glucose molecule. It provides quick energy but is not the main source of ATP generation in cells.
B. anabolic: Anabolic reactions involve building larger molecules from smaller ones, such as protein or glycogen synthesis. These processes consume energy rather than produce it, so they do not contribute to ATP generation.
C. aerobic: Aerobic respiration occurs in the presence of oxygen and includes the Krebs cycle and electron transport chain. This pathway produces the majority of ATP, yielding around 34–36 ATP molecules per glucose, making it the primary energy source.
D. None of the Correct answers are correct: This option does not apply because aerobic respiration is the well-established pathway responsible for generating most of the cell’s ATP.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. it is located just below the epidermis and protects the dermis from shock:The hypodermis is located beneath the dermis, not just the epidermis, and its role is more about cushioning and insulation rather than directly shielding the dermis from shock.
B. the major part of its makeup is adipose, which serves as an effective shock absorber:The hypodermis contains a large amount of adipose tissue that cushions underlying structures, distributes pressure, and absorbs mechanical shock.
C. the cells that make up the hypodermis secrete a protective mucus that absorbs shock:The hypodermis does not secrete mucus; this function is unrelated to connective tissue structure and physiology.
D. it has no delicate nerve endings and can therefore absorb more shock:The absence of many nerve endings does not make the hypodermis a shock absorber. Its cushioning effect is due to adipose tissue composition, not nerve distribution.
Correct Answer is A
Explanation
A. a segment of DNA that carries the instructions for one protein:A gene is a functional unit of DNA that contains the necessary coding sequence to produce a specific protein. It includes exons, which code for amino acids, and regulatory regions that control expression.
B. a strand of introns only:Introns are non-coding segments within a gene that are removed during RNA processing. A gene is not composed solely of introns, as it also contains exons that determine protein structure.
C. an RNA messenger that codes for a particular polypeptide:Messenger RNA is the transcript produced from a gene. While it carries the code for a protein, the gene itself is the DNA sequence, not the RNA product.
D. a three-base triplet that specifies a particular amino acid:A three-base triplet is a codon in mRNA, which specifies a single amino acid during translation. A gene consists of many codons and encompasses the full sequence necessary for the entire protein.
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