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NNADVOKAT [17]
3 years ago
10

Discuss the theories of opening and closing stomata​

Biology
1 answer:
Anestetic [448]3 years ago
3 0

Guard cell o is ordered to opening and closing of stomata.

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11 years

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thats the time it takes for a full solar cycle

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What is a ribosome?
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Answer:

The correct answer will be option C- A structure upon which proteins are assembled.

Explanation:

A ribosome is a complex molecule machine formed of proteins and rRNA molecules which acts as a site for the synthesis of the proteins.

These ribosomes are present in the cell as a free entity suspended in the cytosol or attached to the endoplasmic reticulum.

Each ribosome is made up of a large and small component which translates the information coded in the mRNA in the form of codons to amino acids which join to form proteins.

Thus, option- C is the correct answer.

5 0
3 years ago
Which three of the following are components of the cell membrane?
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The principal components of the plasma membrane are lipids ( phospholipids and cholesterol), proteins, and carbohydrates.

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RNA and DNA are both nucleic acids, but differ in both structure and function. Which of the following is a correct way in which
Amanda [17]

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RNA is a single-stranded nucleic acid. RNA has a ribose sugar instead of a deoxyribose sugar like DNA. RNA nucleotides have a uracil base instead of thymine. There are many different types of DNA RNA is single stranded RNA forms a double helix.

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The dicer enzyme processes dsRNA and forms siRNAs, which suppress the expression of target genes by cutting mRNA. 1) siRNA 2) RNA.

<h3>What are siRNA fragments?</h3>

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siRNAs are complementary double-stranded RNA molecules composed of about 20-21 nucleotides. siRNA originates from a long double-stranded RNA (dsRNA).

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The two mRNA halves are later degraded by the cellular machinery, leading to the suppression of the gene expression.

siRNAs also participate in other pathways related to RNAi, such as in antiviral defense or in the chromatin structure organization.

RNA interference is a mechanism of eukaryotic gene regulation. In this mechanism, the enzyme dicer cuts dsRNA into smaller fragments called (1) siRNA, which form a complex with RISC and degrade specific (2) RNA.

You can learn more about siRNA at

brainly.com/question/7508257

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2 years ago
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