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2 years ago

Name two organelles that get rid of waste in the cell?

Biology

1 answer:

Burka [1]2 years ago

7 0

Answer:

<h2>Endoplasmic reticulum</h2>

The endoplasmic reticulum is a network of membranes within the cell through which proteins and other molecules move. Proteins assemble into organelles called ribosomes. When proteins are destined to be part of the cell membrane or exported out of the cell, ribosomes assemble them and add them to the endoplasmic reticulum, giving it a rough appearance.

Explanation:

<h2>MEXICO ♥</h2>

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Comparing amino acid sequences in proteins has been used to determine the relatedness of organisms. Below is a graphic that show

Tju [1.3M]

Answer:

A) Species A and E are more closely related than either species are related to species D.

B) Between A and B = 99.1%

Between species A and C =97.5%

Between species B and C = 97.3%

Similarity in amino acids sequence reflects similarity in DNA sequence

C) Species A and E are most closely related

D) Species A and E have the most similarity in amino acid sequence, and hence DNA sequence.

Explanation:

A) The amino acid sequences of the protein, keratin, in species A and D has a difference of about 19 whereas species A and E have a difference of only 1. Therefore, it means that keratin in species A and D will have differences in structure whereas between species A and E, they would have almost the same structure.

Also, species D and E have a difference of 20 in their amino acids sequence, therefore, the structure of keratin in both species will have differences in structure.

B) Similarity between A and B:

450 - 4 = 446

In percentage: 446/450 × 100% = 99.1%

Similarity between A and C:

450 - 11 = 439

In percentage: 439/450 × 100% = 97.5%

Similarity between B and C:

450 -12 = 438

In percentage: 438/450 × 100% = 97.3%

The sequence of DNA of species determines their amino acid sequences because information in DNA is transcribed to RNA which are then used to make proteins. Therefore, if a species are very closely related, they are expected to have very similar genetic sequences and thus proteins too. This is reflected in similarity between amino acid sequences in their proteins.

C). Species A and E are most closely related.

D) Species A and E have only a single difference in their amino acids sequence for Keratin. This translates to about 99.7% similarity which is the highest among all the species compared. Therefore, species A and E are most closely related.

7 0

2 years ago

Each nucleotide of rna contains what type of sugar

Lady_Fox [76]

Like DNA, RNA polymers are make up of chains of nucleotides. The sugars they are made up of; a five carbon ribose sugar.

Or Pentose Sugar.

3 0

3 years ago

Read 2 more answers

Denise was measuring the effect of temperature on the amount of dissolved oxygen that water can hold. She hypothesized that as w

ArbitrLikvidat [17]

The data did not support the hypothesis because the amount of dissolved oxygen decreased as water temperature increased.

7 0

3 years ago

Read 2 more answers

How the plasma membrane is important to survival, and necessary for life.

gregori [183]

Answer:

The plasma membranebeing the most necessary component of a cell because it encases and protects the complex chemistry of life within the cell. A selectively permeable membrane allows only certain substances to enter the cell. This is very important to keep necessary nutrients in and keeping unwanted substances out too

6 0

2 years ago

What are the advantages and disadvantages of using RNA or protein as genetic material?

larisa86 [58]

The most important idea is that the genetic material of any organism must be able to accurately replicate itself at least every generation (or for multicellular organisms at each cell division).

Base pairing (A-T or U and C-G)allows DNA and RNA (eg in polio virus, see Wikipedia page on RNA dependent RNA polymerase) to create a copy of themselves, when the appropriate enzymes are present. Proteins have no way of making a copy of themselves.

Stability is probably the main reason DNA is the most common genetic material. DNA has no enzymatic activity and was probably selected for to maintain the integrity of the genetic material (rather than having to perform a function for the cell/virus, during which it may be destroyed). The double helix structure also protects its integrity, and proofreading enzymes have also evolved which correct most of the mistakes made at DNA replication. RNA viruses don't have this mechanism- which could be said to be an advantage (as they can rapidly change and therefore avoid their hosts' immune systems), however in non-parasitic organisms most mutations in a gene would lead to a loss of an essential function and the extinction of that genome.

I don't think either of these reasons are relevant, but I think the main reasons retroviruses convert their RNA to DNA are so they can use the host cell's replication machinery (this was they do not need to encode as many genes), and secondly they need avoid the antiviral mechanisms of the cell, which would destroy any double stranded RNA molecules found (even if the virus was single stranded, dsRNA would have to be produced at replication).

7 0

3 years ago