1. The pH of blood is approximately ___________ [ Select ] [\"7.4\", \"7.8\", \"
ID: 3511788 • Letter: 1
Question
1. The pH of blood is approximately ___________ [ Select ] ["7.4", "7.8", "8.0", "7.0"] and a significant drop in pH leads to the condition of _____________ [ Select ] ["coaggulation", "acidosis", "erythroblastalis", "nuclearization"]
2. The _____________ [ Select ] ["centrioles", "endosomes", "mitochondria", "ribosomes"] are best described as __________-[ Select ] ["bacterial", "animal", "viral"] cell components that organize microtubules
3. Codons and anticodons are based on sequences of _____________ [ Select ] ["12", "1", "2", "3"] nucleotides, and they attach to each other in the ___________ [ Select ] ["ribosome", "nucleus", "RNA", "protein"] by _____________ [ Select ]["covalent", "polar covalent", "hydrogen", "ionic"] bonds.
4. The cellular catabolism of glucose to CO2 and H2O causes __________ [ Select ] ["a decrease in", "the same", "an increase in"] free energy change when compared with a combustion reaction of glucose. This result is due to the___________ [ Select ] ["first", "third", "second"] law of thermodynamics
5. If you eat an excessive amount of _________ [ Select ] ["protein", "fat", "carbohydrates", "salt"] , the excess nitrogen is excreted into your urine in the form of__________ [ Select ] ["blood", "urea", "protein", "water"]
Explanation / Answer
1. The pH of blood is approximately 7.4 and a significant drop in pH leads to the condition of acidosis.
Explanation: The natural pH of the human body and hence normal biologic function is at a pH of 7.4, which is slightly alkaline. When blood pH drops significantly below 7.4, a condition called acidosis occurs.
2. The centrioles are best described as animal cell components that organize microtubules.
Explanation: The microtubule-organizing center (MTOC) is a structure found in eukaryotic cells from which microtubules emerge. The primary MTOC in a cell is called the centrosome, and it is usually located adjacent to the nucleus.
3. Codons and anticodons are based on sequences of 3 nucleotides, and they attach to each other in the RNA by covalent bonds.
Explanation: One end of the tRNA matches the genetic code in a three-nucleotide sequence called the anticodon. The anticodon forms three complementary base pairs with acodon in mRNA during protein biosynthesis. On the other end of the tRNA is a covalent attachment to the amino acid that corresponds to the anticodon sequence.
4. The cellular catabolism of glucose to CO2 and H2O causes an increase in free energy change when compared with a combustion reaction of glucose. This result is due to the second law of thermodynamics.
Explanation: The second law of thermodynamics is that Entropy must increase if a reaction is to be spontaneous. A process can only occur spontaneously if the sum of the entropies of the system and its surroundings increases.
5. If you eat an excessive amount of protein the excess nitrogen is excreted into your urine in the form of urea.
Explanation: If you're eating a high-protein diet to lose weight or increase muscle mass, your body may be producing high amounts of urea, a byproduct of protein metabolism.
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