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1 year ago

The three dimensional folding shape of a prion is probably most determined by

1 answer:

4 0

Prions are infectious agents that are made up of proteins which can fold in multiple ways. The three dimensional folding shape of a prion is determined by folding and intra molecular bonding of the linear amino acid chain. The folding and the intra molecular bonding on the other hand is determined by the amino acid sequence in the prion.

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Which line of poetry best imparts a sorrowful mood? droplets keep a steady beat summer showers refresh the scene bare feet splas

Mandarinka [93]

Sorrowful mood is described a sad feeling, especially when it involves grief or loss. For example- the loss of a thing one loves the most, the loss of a loved family member etc.

So, here in these lines of the poetry, the last line describes the sorrowful mood of the poet.

"branches droop as gray skies loom" .

5 0

2 years ago

Read 2 more answers

Complement proteins and antibodies coat a microorganism and provide binding sites, enabling macrophages and neutrophils to phago

Alexandra [31]

<h2>Opsonization Process</h2>

Explanation:

Opsonization is right answer

Antibodies coat a microorganism and Complement proteins provide binding sites, neutrophils and enabling macrophages to phagocytize the organism.This phenomenon is termed <u>opsonization</u>
Opsonization (likewise, opsonization) is the sub-atomic system such as <em>organisms, or apoptotic cells and molecules</em> are chemically modified to have a more stronger attraction for the cell surface <em>receptors on NK cells and phagocytes </em>With the antigen-covered in opsonins, binding to immune cells is greatly enhanced
Opsonization occurs through the connection of an opsonin to an epitope of the pathogen or dead cells
Secure cells and pathogens all have contrarily charged cell membranes

4 0

2 years ago

Oh, no... you dropped your study flashcards, and now they're out of order! Put them back into the correct order for a eukaryotic

Nezavi [6.7K]

The given question is incomplete, the complete question is:

Oh, no... you dropped your study flashcards, and now they're out of order! Put them back into the correct order for a eukaryotic cell.

a. "Combine the mRNA strand with a ribosome and a tRNA carrying a methionine."

b. "Unwind the DNA molecule near the promoter."

c. "Exit the nucleus to the cytoplasm."

d. "Transcribe the complementary RNA strand."

[Tip: you might want to work out the correct order on a piece of scratch paper before selecting from the options below.]

c - d - b - a

b - d - c - a

c - b - d - a

d - b - c - a

b - d - a - c

Answer:

The correct order would be b, d, c, a.

Explanation:

First unwinding of the molecule of DNA takes place close to the promoter. After that transcription of the complementary RNA strand takes place, then mRNA moves out of the nucleus into the cytoplasm. Ultimately, the combination of ribosome and tRNA carrying a methionine takes place with the mRNA.

The order is based upon the central dogma of the cell. Based on the central dogma concept, the transcription of the mRNA takes place in the first place, which then gets transported out of the nucleus into the cytoplasm in the eukaryotic cell. The unwinding of DNA takes place close to the sequence of the promoter for the process of transcription.

In the promoter region, various transcription factors are present and binding of RNA polymerase takes place with the template strand. The generated mRNA then get transported out of the nucleus into the cytoplasm. Post transcription, translation of mRNA takes place with the assistance of tRNA and ribosome. In the mRNA, the start codon generally codes for methionine because of which the tRNA that carries methionine identifies the start codon, and the process of translation gets initiated.

5 0

2 years ago

A maternal effect can cause the offspring phenotype ratio to depart from that of classic Mendelian inheritance. In a species of

Luda [366]

<h2>Maternal effect</h2>

Explanation:

In maternal effect the phenotype of the progeny is decided by the genotype of the mother

The female partner is one step ahead to her male partner
The ovum transcribes some of its nuclear genes prior to fertilization and these genes are responsible for the development of embryo that is why these genes are called maternal effect genes
This effect is observed in Drosophila

In the given question both male and female have brown eyes with Nn genotype,phenotype of the offspring will be decided by the genotype of mother(Nn) hence despite of having recessive genotype(nn) all the offsprings will show brown eyes

6 0

2 years ago

A student prepared a slide of pollen grains from a flower. First the pollen was viewed through the low-power objective lens and

bearhunter [10]

Answer:

(2) low power: 100 small pollen grains

high power: 25 large pollen grains

Explanation:

Compound light microscopes are devices used to greatly magnify objects. They have several objective lenses, a low-power lens magnifies 10 times (10X) the objects, and the high-power lens magnifies them 40 times (40X).

For that reason, when observing the pollen grains with the high-power lens the student will see them bigger than with the low-power lens. However, the field of view (the visible area through a lens) is reduced when a higher power lens is used, so fewer pollen grains will be seen.

The answer therefore is the option of higher number of pollen grains of small size for the low-power lens, and lower number of pollen grains of larger size for the high-power lens.

3 0

1 year ago