Answer:
A
Explanation:
The reason the deletion of a nucleotide can be a lethal mutation is that it causes a frameshift mutation. This is due to teh fact that the codon sequence on the DNA is shifted by a single nucleotide. Therefore, the codons will read differently downstream from the place the deletion happened. The amino acids coded for by these codons will change too. The translated proteins will be defective and the organisms will be adversely affected, phenotypically.
The most dangerous mutation to a cell among the given choices would be the deletion of one nucleotide. This could result in a frameshift mutation, which can change every subsequent codon and potentially lead to a non-functional protein.
In the context of mutations and their potential harm to a cell, between the options of deletion of one nucleotide, deletion of three nucleotides, or substitution of one nucleotide for another, the most dangerous would likely be the deletion of one nucleotide.
Mutations including deletions or insertions can cause a frameshift mutation if the number of nucleotides added or deleted is not a multiple of three. For each set of three nucleotides, called a codon, corresponds to a single amino acid. A deletion of one nucleotide would shift the reading frame, potentially changing every subsequent codon and thus every subsequent amino acid in the sequence. This can result in a non-functional protein, and therefore, have significant detrimental effects on the cell.
In contrast, the deletion of three nucleotides (a complete codon), would only result in the loss of a single amino acid in the produced protein, which may or may not significantly impact the function of the protein. Similarly, while a substitution could potentially alter the amino acid specified by the affected codon, this is less deleterious than a frameshift mutation.
#SPJ11
Answer: ADAPTATION
Explanation:
It's camouflaging ability makes it undetectable because it blends in with it's environ
B)determining medical problems
C)fueling nuclear reactions
D)treating brain tumors
Radioactive tracers are useful in determining medical problems.
Answer: B. Determining medical problems.
Explanation:
Radioactive tracers are comprised of carrier particles that are reinforced firmly to a radioactive atom. These bearer particles shift incredibly relying upon the motivation behind the scan.
A few tracers utilize atoms that associate with a particular protein or sugar in the body and can even utilize the patient's very own cells.
Examples of radioactive tracer are - tritium, carbon-11, carbon-14 and oxygen-15 and so forth. Radioactive tracers are either injected in the body intravenously or orally.
Answer:
Most of the ATP in cells is produced by the enzyme ATP synthase, which converts ADP and phosphate to ATP. ATP synthase is located in the membrane of cellular structures called mitochondria; in plant cells, the enzyme also is found in chloroplasts.
Explanation:
Answer:
When the cell has extra energy it stores that enrgy
by reattcaching a free phosphate molecule to ADP, turning it back into ATP. The ATP molecule is just lile a rechargable battery.
The given blank can be filled with performs all the function.
In case of unicellular organisms, which have a single cell, this single cell perform all the function. For a living organism, responding to stimuli, reproduction, obtaining nutrition, excretion and performing all the metabolic process is necessary. If the organism is made up of single cell, that single cell will perform all these functions necessary for life, other wise, it would be dead.
b. rich in minerals and organic material
c. found below the B horizon
d. very resistant to wind erosion
Answer: The correct answer for the blank is- b. rich in minerals and organic material.
Topsoil is the outermost layer of the soil, which is generally 5 to 10 inches in thickness. This layer is enriched with minerals, organic matter, and microorganisms. It is the site of maximum biological activity that occur on the earth. Roots of plants are also concentrated in this layer so that they can absorb all the nutrients essential for the growth of plant.
Thus, option B) rich in minerals and organic material is the right answer.