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jeyben [28]
3 years ago
8

(Spike protein is a kind of

Biology
1 answer:
Verdich [7]3 years ago
3 0

Answer:

Protein that is made up of 1,160 to 1,400 amino acids.

Explanation:

The Spike protein is a type of protein that is made up of 1,160 to 1,400 amino acids. Different viruses have different amount of amino acids in their spike protein depending upon the type of virus. This spike protein is highly glycosylated and large type I transmembrane fusion protein. Spike protein is a glycoprotein that spreads from the envelope of some viruses which facilitates the virion in entering into a host cell.

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Which of the following describes a parasite? (I know it’s between B or D but I’m not sure which one, also, please don’t put link
aivan3 [116]

Answer:

B) A worm that lives inside a bear.

Explanation:

A parasite is a living organism that lives inside or outside of another organism called a HOST in order to obtain nourishment from such organism. A parasite that lives inside its host is called ENDOPARASITE while a parasite that lives outside its host is called ECTOPARASITE.

In this question, a worm that lives inside a bear is a PARASITE because it is living inside the bear, which is the host in order to obtain nourishments. Note that, the answer is not option D because the bear is a HOST not a parasite.

4 0
3 years ago
To which substance does ferredoxin transfer an electron?
Sonbull [250]

The right answer is NADP+.

Ferredoxin is an iron-sulfur protein that effects electron transfer in a large number of redox reactions in cell metabolism through Fe-S clusters whose iron cations oscillate between +2 (ferrous) oxidation states. and +3 (ferric). The first protein of this type was isolated in 1962 from the anaerobic bacterium Clostridium pasteurianum. A chloroplast-specific ferredoxin is involved in the cyclic and noncyclic photophosphorylation reactions of photosynthesis. In non-cyclic photophosphorylation, ferredoxin is the ultimate electron acceptor and reduces NADP + under the action of ferredoxin-NADP + reductase (EC 1.18.1.2) with FAD and a flavin group as cofactors:

2 ferredoxin- [Fe (2+) Fe (3+) S2 (-2)] + NADP (+) + H (+) ==> 2 ferredoxin- [Fe3 (+2) S2 (-2)] + NADPH .

3 0
3 years ago
Read 2 more answers
Choose one of the clouds that you learned about and explain some features about that cloud.
posledela
Answer: cumulus

Explain: cumulus clouds are clouds with flat bases are often described as puffy, cotton-like, or fluffy on appearance.

Cumulus clouds often precursors of other types of clouds, such as cumulonimbus, when influenced by weather factors such as instability, moisture, and temperature gradient.
8 0
3 years ago
The pH of normal rainwater is _____. <br> A. acidic <br> B. neutral <br> C. basic
qwelly [4]
The answer is A. acidic
5 0
3 years ago
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In Drosophila, the bar mutant is characterized by eyes that are restricted to a narrow, vertical bar. When a bar female is mated
Lelechka [254]

Answer:

See the answer below

Explanation:

a) The mode of inheritance of the bar mutant is X-linked and dominant.

Assuming that barness is represented by the allele B.

Bar female = X^BX^B or X^BX^b

Wild type male = X^bY

Bar female x wild type male:

                 X^BX^B    x    X^bY

          X^BX^b   X^BY  X^BX^b    X^BY

All of the F1 flies are bar because a single B allele is required for the trait to be expressed.

Bar male x wildtype female

                            X^BY   x   X^bX^b

                 X^BX^b    X^BX^b   X^bY    X^bY

All the female offspring are barred while all the males are wildtype barred resulting in a 50/50 (857/905 is approximately 50/50) ratio of barred/wildtype offspring.

b) Genotypes of each of the cross above, including the parents and the F1 generations.

1.             X^BX^B    x    X^bY

          X^BX^b   X^BY  X^BX^b    X^BY

2.               X^BY   x   X^bX^b

           X^BX^b    X^BX^b   X^bY    X^bY

                 

4 0
3 years ago
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