An mRNA of 429 nucleotides will form a polypeptide chain with 143 amino acids, assuming each codon (set of 3 nucleotides) corresponds to an amino acid and the stop codon is not counted.
For the synthesis of protein in a process known as translation, each triplet set of nucleotides in the mRNA, called a codon, identifies a specific amino acid. Hence, an mRNA of 429 nucleotides would be segmented into a set of 3 to form the different codons for the amino acids. Since 429 divided by 3 is 143, the polypeptide chain resulting from this mRNA would have 143 amino acids.
In this case, the correct answer would be (A) 143. This calculation does not take into account the stop codon that does not correspond to an amino acid, but usually examination questions ignore the effect of the stop codon. To provide the most accurate answer, we would need to know if the mRNA sequence includes the stop codon or not.
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Answer:
small
Explanation:
The overall error rate of DNA polymerase during replication is 10-8 errors per base pair. Repair enzymes fix 99% of these lesions for an overall error rate of 10-10 per bp. That means one change occurs in every 10 billion base pairs that are replicated.
DNA replication is a highly accurate process, occurring rapidly and with a small number of mistakes, due to the efficiency of the DNA polymerase enzyme and the cell's repair mechanisms. However, any uncorrected mistakes can cause significant consequences, like mutations or even diseases like cancer. This process has been closely studied in prokaryotes such as E. coli.
DNA replication, a critical biological process, typically occurs with a remarkably small number of mistakes, thanks to the accuracy of the DNA polymerase enzyme and other repair mechanisms. This process has been particularly well-studied in prokayotes, like E.
coli, which can replicate its 4.6 million base pairs in about 42 minutes, adding around 1000 nucleotides per second.
However, when mistakes do occur and are not corrected, they can lead to mutations which might have serious consequences, such as cancer, particularly if the repair enzymes themselves are mutated or defective.
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B. Release of melatonin to regulate sleep cycle
C. Pulling your hand off a hot stove
Answer:
B. Release of melatonin to regulate sleep cycle
Explanation:
b. Glucagon
c. Glucose
d. Cellulose
Glycogen provides long-term energy storage.
Glycogen is an example of a carbohydrate which is a polysaccharide that acts as a long-term energy storage compound in animals.
Energy source in animals
Energy source in plants
Why other Choices are incorrect:
Keywords: Glycogen, Glucose, energy sources
Level: High school
Subject: Biology
Topic: Cellular respiration
Glycogen serves as a long-term energy storage molecule in animals, including humans. Therefore option A is correct.
It is a complex carbohydrate made up of glucose units linked together in a branched structure. When dietary glucose levels are high, excess glucose is converted into glycogen and stored primarily in the liver and muscles.
This stored glycogen can be broken down into glucose when energy is needed during periods of fasting, exercise, or other metabolic demands.
Glucose, on the other hand, is a simple sugar that serves as an immediate energy source, while glucagon is a hormone involved in regulating blood glucose levels. Cellulose, a structural polysaccharide, is not used for energy storage in animals.
Know more about Glycogen:
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Answer:
Period table is an alloy of copper and tin
Answer: tabular array of the chemical elements organized by atomic number
Explanation:
the following is NOT a function of
these?
A. allows the strand to leave the nucleus
B. helps the strand attach to a ribosome to be
translated
C. signals that introns need to be spliced out
D. protects the strand from enzymes
Answer: The answer is C
Explanation: The answer is signals that introns need to be sliced out, I got it right!
C. signals that introns need to be spliced out. The 5' cap and the poly A tail of an RNA molecule serve to allow the molecule to exit the nucleus, attach to a ribosome, and protect from degradation. They do not signal for introns to be spliced out.
The RNA molecule has a 5' cap and a Poly A tail at the 3' end. These modifications play a few key roles in the functionality of the RNA molecule but the statement 'signals that introns need to be spliced out' (option C) is NOT one of the functions of these modifications.
The 5' cap allows the RNA to exit the nucleus and attach to a ribosome, while the poly-A tail helps stabilize the RNA, aids in the exit from the nucleus, promotes translation, and protects the RNA strand from enzymes that degrade RNA from the 3' end. Neither of these modifications signal for introns to be spliced out, that is primarily the function of spliceosome complex which recognize specific site sequences within the RNA.
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bulimia
starvation dieting
obesity
Answer: starvation dieting
Explanation:
The composition of human and animal teeth is calcium and phosphate. The diet of a human affects the condition of the teeth. High concentration of sugars and fats in the food will likely to damage teeth. Also the deficiency of calcium and other minerals essential for teeth development may indicate the signs of eating disorders. Therefore, starvation dieting is the correct option.