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Elena L [17]
3 years ago
11

What distinguishes archaea from animal cells? View Available Hint(s) What distinguishes archaea from animal cells? Archaea's RNA

polymerase is unlike that of animal cells. Archaea have cell walls. Only animal cells associate DNA with histones. Archaea utilize methionine as the first amino acid during translation.
Biology
1 answer:
lapo4ka [179]3 years ago
5 0

Answer & Explanation:

All archeas are single-celled organisms, and despite having prokaryotic cells, there are both similarities and differences between archaea and bacterial cells and also with eukaryotes.

Archaea have only one cell that has no nucleus or real organelles, and its cells have membranes composed of branched lipids, which greatly alter the structure of the archaeal cell membranes. In addition, the archaea have only one DNA strand (uniqueness).

Animal cells differ from archeas because they are multicellular (organisms with several cells), each one having a nucleus, and they also have specialized organelles.

In addition, animal cells have compounds called phospholipids in their membranes, which are unbranched lipids, and therefore do not cause major changes in the structures of their cells. Finally, animal cells have double-stranded DNA (complementary duplication).

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What is the relationship between mutation, the cell cycle, and cancer? Select all statements that apply.
OverLord2011 [107]
Cancer is a mutation of multiple cells through the cell cycle. cancer doesn’t only effect one cell, but effects many
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3 years ago
The histone proteins are among the most slowly evolving proteins. For example, a histone protein called histone H4 in cows and p
juin [17]

The statement is true, histones are proteins that are high in the amino acids lysine and arginine, making them extremely basic in their structure.

Histones control the degree of packaging of DNA during the processes of gene expression, replication or repair of hereditary material, among many others.

Histones H2A, H2B, H3 and H4 are small and basic proteins that are highly conserved in evolution and are composed of a globular domain at the carboxy-end, and by regions known as "tails", which are found at the amino-terminal end.

These tails are high in the amino acids lysine and arginine, which give them a positive charge.

This region is the site of numerous post-translational modifications that, it has been proposed, would modify the histone charge, altering the accessibility of the DNA and the protein / protein interactions with the nucleosome.

Chromatin compaction occurs due to the interaction between the negative charges of DNA and the positive charges of amino acids, mainly located on the tails of histones H3 and H4.

Therefore, we can conclude that the modifications on the amino acids lysine and arginine that form the basic part of the histone structure alter their functions.

Learn more about histone proteins here: brainly.com/question/14984828

8 0
3 years ago
Which is the correct order of developer of the human embryo ???ASAP please
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The initial stages of human embryogenesis.

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7 0
4 years ago
Describe the events that happen during the following phases of photosynthesis:
jarptica [38.1K]

Answer:

Photosynthesis consist of two types of reaction 1 light dependent reaction 2 light independent reaction or dark reaction.

Explanation:

                        light dependent reaction

light dependent reaction or light reaction occur in the thylakoid of granum of chloroplast.During light reaction light energy is absorbed by various pigments of the photosystem and is finally converted into chemical energy.

  During light reaction water is split in presence of sunlight to form H+ and OH- ions.The OH- ions releases electron.The released electron is then transported through various electron carriers resulting in the formation of ATP molecule by cyclic photo phosphorylation and NADPH by noncyclic photophosphorylation.

                          Light independent reaction

Light independent reaction or dark reaction occur in the stroma of chloroplast.The ATP and NADPH that is formed during light reaction is used as 3:2 ratio for per molecule of glucose production.

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3 years ago
What role do volcanoes play in generating carbon dioxide
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