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3 years ago

19. Which of the following is the best strategy to control wheat rust?

Biology

1 answer:

valentinak56 [21]3 years ago

8 0

Answer:

B. Fungicides to treat affected crops and planting rust-resistant varieties

Explanation:

Leaf rust is a disease caused by the fungus <em>Puccinia triticina</em> which affects leaves, stems and grains in wheat and related cereals (i.e., barley and rye). This disease is known to affect crops in moist conditions. Leaf rust disease is spread through fungi spores from infected wheat plants to healthy plants. Recently, leaf rust-resistant varieties have been developed by crop improvement programs aimed at introducing leaf rust-resistant (lr) genes involved in resistance against this important crop disease. Moreover, there are different types of fungicides (e.g., Prothioconazole and Tebuconazole) used for chemical control of this disease.

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Which of these sentences is true about the virus?select one of the options below as your answer:

Dima020 [189]

When infected by a virus, a host cell produce many thousands of identical copies of the original virus. so the answer is B
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3 years ago

Select the correct answer from each drop-down menu. rna interference is a mechanism of eukaryotic gene regulation. in this mecha

rosijanka [135]

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>

siRNA means small interfering RNA. This is a silencing RNA molecule involved in the RNA interference mechanism, intervening in the expression of a specific gene.

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

The dicer enzyme cuts dsRNA molecules and produces siRNA. siRNAs suppress the expression of target genes when cutting messenger RNA.

siRNAs suppress the expression of target genes by cutting the complementary messenger RNA (mRNA) into two halves. This is accomplished by the interaction of the siRNA with the RISC complex (RNA-induced silencing complex).

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

What are two important parts of the human digestive system

slamgirl [31]

Answer:

Regions of the digestive system can be divided into two main parts: the alimentary tract and accessory organs.

Explanation:

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2 years ago

What are the simplest types of eukaryotes

Kaylis [27]

Answer:

The Simplest of Eukaryotic Cells. Microsporidia are intracellular parasites that infect most other eukaryotic cells, although arthropods are the most commonly parasitized. They are the simplest and smallest eukaryotic cells and thus represent a textbook example of reductive evolution [1].

Link: https://designmatrix.wordpress.com/2009/03/10/the-simplest-of-eukaryotic-cells/

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3 years ago

The protein separates from the ribosome in which step of translation

almond37 [142]

<span>The second step of protein synthesis is translation, which occurs in the cytoplasm and requires ribosomes. A small ribosomal subunit attaches to the bottom of the mRNA strand, and a large ribosomal subunit to the top of the mRNA. Then the synthesis can begin.</span>

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3 years ago