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Gelneren [198K]
3 years ago
6

Which statement is true of the two molecules below? Glucose or fructose

Biology
1 answer:
aleksandrvk [35]3 years ago
5 0
Not sure what you are asking but I do know that > <span>Glucose can form a cyclic molecule, while fructose cannot. </span>
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Which statements about the modification of chromatin structure in eukaryotes are true? Select all that apply. View Available Hin
Kay [80]

The correct answers are:  

  • Methylation of histone tails in chromatin can promote condensation of the chromatin.
  • DNA is not transcribed when chromatin is packaged tightly in a condensed form.
  • Acetylation of histone tails is a reversible process.
  • Some forms of chromatin modification can be passed on to future generations of cells.  
  • Acetylation of histone tails in chromatin allows access to DNA for transcription.

Histone modifications are post-translational modifications of histone protein that can affect gene expression by altering chromatin structure or recruiting histone modifiers.The most common modifications are methylation, phosphorylation, acetylation and ubiquitylation. All of them affect the binding affinity between histones and DNA and thus loosening (gene activation) or tightening (gene repression) the condensed DNA.

Histone methylation is a transfer of methyl group by histone methyltransferases to lysine or arginine amino acid of protein. Effect of methylation depends on the type of protein that is modified. Demethylation is the reverse process.

Histone acetylation is the process of adding of an acetyl group(by  histone acetyltransferases) to histone proteins and it can also activate or inhibit the gene expression. Deacetilation is reverse process.

7 0
3 years ago
Explain how sulfur mining affects plant life.
Likurg_2 [28]

<em>Although the landscape shows a certain ability to persist, underground mining activity has caused some effects such as ground fissures (cracking), disturbance of the vegetation community and damage to strata.</em>

8 0
3 years ago
Read 2 more answers
Of the following muscle types, which has the longest muscle cells and has obvious stripes called striations? Of the following mu
kumpel [21]

Answer:

Explanation: skeletal muscle

6 0
3 years ago
Read 2 more answers
Answer For Brainlest, thanks.
Nonamiya [84]

Answer:

Oil

Explanation:

Oil is the most common fossil fuel internationally, seeing as it is in the top spot for usefulness.  

3 0
3 years ago
Species A has a diploid number of 42 chromosomes, while species B has a diploid number of 48 chromosomes. Give the chromosome nu
Arada [10]

Answer:

a. autotriploid of species A: 63 chromosomes

b. autotetraploid of species B: 96 chromosomes

c. allotriploid from species A and B: 1) 66 chromosomes and 2) 69 chromosomes

Explanation:

<u>For a.</u>

this species will have 3 haploid sets of chromosomes ('tri' means 3)

one haploid set = 21

21 × 3 = 63 chromosomes

<u>For b.</u>

this species will have 4 haploid sets of chromosomes ('tetra' means 4)

one haploid set = 24

24 × 4 = 96 chromosomes

<u>For c.</u>

there are two ways to do this:

1) two sets of chromosomes from species A and one from species B

42 + 24 = 66 chromosomes

2) one set of chromosomes from species A and two from species B

21 + 48 = 69 chromosomes

Hope that answers the question, have a great day!

5 0
3 years ago
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