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makkiz [27]
3 years ago
10

The alpha helix and beta pleated sheet represent which level of protein structure?

Biology
1 answer:
hram777 [196]3 years ago
5 0

Polypeptide chains represent the primarylevel of protein structure. The secondarystructure of a protein results from hydrogen bonding between amino acids in the peptide chain. This leads to twisting or folding of the chain into the alpha helix and the beta pleated sheet shapes.

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Alternation of generation
Nastasia [14]

Answer:

The answer to this question is given below in this explanation section.

Explanation:

                    "Alternation of generation"

Alternation of generations is the type of life cycle that occurs in those plant  and algae in the archaeologist and the heterokontophyta that have distinct haploid sexual and diploid asexual stages.In these groups a multicellular haploid gametophyte with n chromosomes alternates with a multicellular diploid sporophyte with 2n chromosomes made up of n pairs.A mature sporophyte produces haploid spores by meiosis a process which reduces the number of chromosomes to half from 2n to n.

Two haploid spores germinate and grow into a haploid gametophyte.At maturity ,the gametophyte produces gametes by mitosis which does not alter the number of chromosomes.Two gametes from different organism of the same species fuse to diploid zygote,which develop into a diploid sporophyte . This cycle from gametophyte to sporophyte in the way in which all land plant and many algae undergo sexual reproduction.

8 0
3 years ago
If you placed a letter g under a microscope, how would the image look in the field of view?
NeX [460]
Well if you placed the g facing you , it would look upside-down under a microscope , but if you faved it facing the other direction it would look as if it was facing you (the correct way)
4 0
3 years ago
Why are fossil fuels considered a nonrenewable energy source?
joja [24]

Fossil fuels are considered a nonrenewable energy source because once fossil fuels are used, they are gone. So, the correct option is A.

<h3>What do you mean by Nonrenewable energy?</h3>

Nonrenewable energy may be defined as that energy that once consumed can not be replenished for millions of years.

Fossil fuels are examples of nonrenewable energy resources. The formation of fossil fuels may take over millions of years. This fuel is made naturally by the decomposition of dead and decayed organic living matter.

Therefore, the correct option for this question is A.

To learn more about Fossil fuels, refer to the link:

brainly.com/question/79954

#SPJ2

6 0
2 years ago
Please help, past due.
stepan [7]
Do your work bad kid :)
8 0
2 years ago
Why are cells limited in size?
seropon [69]
Cell is limited in size for many reasons. Cells wouldn't be respire effectively if it were too large, because the surface area to the volume ratio would be too small.
The other thing is that if the cell were too large, it would be difficult for it to move nutrients and waste products in and out of the cell. So, cells are limited in size.
5 0
3 years ago
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