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3 years ago

What is meant by the "beads on a string" model of chromatin?

Biology

1 answer:

swat323 years ago

4 0

Answer:

The answer to your question is: letter A

Explanation:

Beads on a string is a nucleosome (beads) with a string wrap around it (DNA).

(a)The beads are the nucleosomes, and the string is the linker DNA. This option is describing perfectly what the expression "beads- on a string means".

(b)-The beads are ribosomes, and the string is the mRNA that has been transcribed from active chromatin. Ribosomes are very useful organele in the traduction process but are not part of the expresion "beads on a string".

(c)-The beads are molecules of DNA polymerase that attach to the DNA string. THis option is wrong, beads are the nucleosomes.

(d)-The beads are the histones, and the string is the transcriptionally active DNA loops. Beads on a string do not consider that DNA is being unde rtranscription.

(e)- The beads are the heterochromatic regions that are tightly compacted, and the strings are euchromatic regions that are being actively transcribed.

This option is incorrect.

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sladkih [1.3K]

Answer:

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Explanation:

To prove the stored food in leaves is starch, first we will take a leaf, then we will treat the leaf in hot water followed by alcohol. The leaf will die when comes in contact with hot water and the alcohol will help us in the break down of the chlorophyll. Which will fade the green color. Now, we will put iodine, which we use as an indicator in the leaf, when it turn blue-black, it is confirmed that starch is present in the leaf. Sometimes the leaf will turn reddish brown, which depicts the absence of starch.

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3 years ago

Rhesus monkeys and gorillas have stereoscopic vision, which allows them to better visually gauge distances while hunting and mov

Marianna [84]

The organisms that have stereoscopic vision as well are Gibbon, orangutan, common chimpanzee, bonobo, and human.

<h3>What is evolution?</h3>

The term evolution has to do the changes that take place in an organism as they move from one form to another. The process of evolution accounts for the fact that higher organisms are obtained from the lower ones via the process of evolution.

Thus, if stereoscopic vision evolved only once on this tree, and was never subsequently lost, other primate species on the evolutionary tree which possess stereoscopic vision as well are Gibbon, orangutan, common chimpanzee, bonobo, and human.

Learn more about evolution:brainly.com/question/13492988

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Missing parts;

Rhesus monkeys and gorillas have stereoscopic vision, which allows them to better visually gauge distances while hunting and moving through tree canopies. If stereoscopic vision evolved only once on this tree, and was never subsequently lost, which other primate species on the evolutionary tree possess stereoscopic vision as well? (Hint: First, find the location on the tree of the most recent common ancestor of rhesus monkeys and gorillas.)

Human

Gibbon and orangutan

Gibbon, orangutan, and human

Gibbon, orangutan, common chimpanzee, bonobo, and human

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2 years ago