Aflatoxin is:_________a) the loss of an amino group on a nitrogenous base.
b) the gain of an amino group on a nitrogenous base.
c) an artificial mutagen.
d) another name for unmethylated cytosine.
e) a natural mutagen.

Answers

Answer 1

Answer:

Answer:

E) a natural mutagen.

Explanation:

Aflatoxin is a toxin byproduct produced by the fungi especially Aspergillus molds which grows attached to the roots of various crops like the peanuts, wheat and many others.

The aflatoxin is considered a carcinogen and a mutagen as it causes certain changes in the structure of DNA. The aflatoxin mainly affects the liver and causes a mutation in the genes of the liver and since the aflatoxin is produced naturally by the molds, therefore, is considered a natural mutagen.

Thus, option-E is correct.

Related Questions

Which is the correct sequence of events during embryonic development?(A) cleavage — differentiation — fertilization — gastrulation (B) differentiation — fertilization — gastrulation — cleavage (C) fertilization — cleavage — gastrulation — differentiation (D) fertilization — differentiation — cleavage — gastrulation (E) fertilization — gastrulation — differentiation — cleavage
All of the statements about bacteria are true EXCEPT one. Which statement is not true?a. A number of useful pharmaceutical drugs are made by bacteria.b. Bacteria are thought to be the first group of photosynthetic organisms.c. Bacteria are the only group of organisms that can fix nitrogen into the soil.d. The majority of bacteria on earth can cause disease, if given the opportunity.
Genetics is the study of what?
After the skin is cut and a capillary wall breaks, what's the first step in working to form a clot? A. A set of reactions are triggered. B. Thrombin causes sticky fibrin filaments to form the clot. C. The clot seals the area to prevent further blood loss. D. Platelets clump at the site.
The scientific name for a white oak is Quercus alba; the scientific name for a red oak is Quercus rubra. What does this tell you about the organism? A. Red oaks are grouped in the genus alba. B. White oaks are grouped in the genus Quercus. C. White oaks are grouped in the same species category as red oaks. D. Red oaks are grouped in the species Quercus. Is it B????

Which statement best describes an understanding of genetics that would be missing without the work of Mendel?a. The DNA codes for traits would not be known.
b. The protein codes for traits would not be known.
c. Some alleles are dominant, and some alleles are recessive.
d. Offspring receive two copies of each allele from each parent.

Answers

The answer is c. Some alleles are dominant, and some alleles are recessive.

Gregor Mendel established the principles of heredity. To explain his experiments and discoveries, he invented terms dominant and recessive in reference to traits.

The other statements are not true because the DNA and protein codes were researched and discovered almost a century after Mendel's work. The statement that offspring receive two copies of each allele from each parent cannot be true since offspring receive only one copy of each allele.

Answer:

C. Some alleles are dominant, and some alleles are recessive.

Explanation:

What is a chemical element?

Answers

A part or aspect of something abstract, especially one that is essential or characteristic

Which energy source do plants use to produce sugar

Answers

The source of energy plants use to produce its own food which is to form glucose is the sunlight.

In the process of photosynthesis, "photo" which means light. Hence the sun's rays radiating on the earth's surface. The function that carries out the absorption is the chlorophyll, and chloroplast where this mecanism happens.

Can someone please rewrite this and make it sound good. PLEASE HELP VERY DESPERATE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!The scientist obtains either the same gene or the same protein from each of the three organisms. Then the sequence of the DNA or protein is determined and the three sequences are lined up and compared to see how well they match. The greater the match between any pair of sequences, the closer the linkage is between the two organisms. The greater the difference in sequence, the more distant the relationship. Once it has been determined how close or distant the relationship is between all of the organisms, a diagram is created that resembles a branched tree. Organisms are placed on closely linked branches if they have a strong math in sequence, while organisms with poorly matching sequences are placed on branches much farther away from one another.

Answers

The scientist gather the same DNA or Proteins from all 3 organisms, which will help determine the sequencing of the Protein or DNA. They then line them up and compare each DNA or Protein to measure how well they match. Depending on how well they match they can then determine how closely related or un-closely related they are. When observing the DNA or Protein the more closer related they Appear to be the more Un- Related they Actually are. When Scientist Know how closely related they are they may then make a Tree Diagram showing the resemblance. When looking at the branch the more closely related they are the, the closer they will appear on the Tree Diagrams Branches. Then the less related they are the farther they are placed from each other on a branch of the Tree Diagram.

Describe how Mendel showed that the green-seed trait did not disappear but was only masked.

Answers

Mendel had determined that the allele for green seeds had not vanished because after the second generation of yellow seeds, green seeds started appearing again. He logically concluded that the yellow allele was a dominant trait and the green allele was a nondominant trait.

A long-haul commercial jet covers the 12,450 km from Beijing to Mexico City in 13.5 hours. What is its average speed?

Answers

Answer: 256.2 m/s (meters per second)

Explanation: Distance covered is 12450km and time used is 13.5hours. We first convert these values to standard units for distance (meters) and time (seconds).

12450 km = 12450 x 1000 m = 12,450,000 m

13.5hours = 13.5 x 60 x 60 = 48,600s

Average speed = $(Distance)/(Time taken) = (12450000)/(48600) = 256.2m/s$