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Setler79 [48]
3 years ago
11

A cell has formed a food vacuole as it ingested a food particle. Which of the following events is associated with the breakdown

of that food particle?
Proteins for digestion of the food are made by ribosomes in the Golgi apparatus.
Digestion of the food particle occurs in a vesicle enclosed by a membrane that separates the digestion from the cytoplasm.
Proteins for digestion of the food particle were initially processed in mitochondria.
The membrane of the food vacuole is derived from the cell wall.
Enzymes for the breakdown of the food are delivered to the food vacuole from the cytosol.
Biology
1 answer:
mina [271]3 years ago
7 0

Answer:

Digestion of the food particle occurs in a vesicle enclosed by a membrane that separates the digestion from the cytoplasm

Explanation:

A food vacuole is a membrane-enclosed sac in a cell which is formed by the ingestion of the food particle from the outside environment through the process of phagocytosis.

The formation of food vacuole is a feature of the protozoa like amoeba which engulfs its food.

The food vacuole then fuses with the lysosome present in the cell which contains the digestive enzyme and then forms phagolysosomes which can digest the food particles in an enclosed sac.

Thus, the selected option is the correct answer.

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In a fox population, the allele frequency of a gene for red fur changes from 20 percent to 30 percent.What can be concluded abou
Leni [432]

Answer:

The correct answer would be B. the population is evolving.

It can be explained with the help of natural selection. It is a natural phenomenon by which organisms which are better adapted to the changing environment have better chances to survive and reproduce.

It leads to a change in the allele frequency of that trait in a population.

For example, in the given population, the allele frequency of red fur increases from 20 to 30 percent. That means the population is evolving to adapt to the changing environment.

7 0
4 years ago
Read 2 more answers
Which of the following best explains how the expression of a eukaryotic gene encoding a protein wil differ if the gene is expres
Ivan

Answer: c. The protein will be made but will not function, because prokaryotes cannot remove introns.

Explanation:

Eukaryotic cells are cells that have membrane-surrounded organelles, such as a nucleus which is an organelle that stores the DNA, the genetic material. On the other hand, prokaryotic cells do not have a nucleus, and the genetic material is a single molecule, usually circular and closed and double-stranded, which is located in a sector of the cell known as the nucleoid (meaning "similar to the nucleus"), which does not imply the presence of a nuclear membrane.

<u>A gene is a unit of information at a DNA locus that codes for a protein. To synthesize that protein, DNA must be transcribed into messenger RNA (mRNA), and that mRNA is read by ribosomes in a process called translation or protein synthesis</u>. The difference between protein synthesis in prokaryotic and eukaryotic cells is that in prokaryotes, transcription and translation take place directly in the cytoplasm since there is no nucleus. In eukaryotes, transcription takes place inside the nucleus, to generate mRNA. This mRNA molecule is then directed to the cytoplasm where translation happens.

a. In prokaryotic cells, ribosomes are produced in the cytoplasm, whereas in eukaryotic cells they are generated in the nucleolus within the cell nucleus. So they both have ribosomes and they are used to make proteins, then this option is true.

b. RNA polymerase initiates transcription of all different types of RNA (mRNa, ribosomal RNA and transfer RNA). However, there are three RNA polymerase variations, each one translate a different type of gene. But, prokaryotic RNA polymerase can translate eukaryotic genes. Then this option is not true.

c. Prokaryotic cells don't  have introns because those cells do not perform a post-transcriptional RNA modifications, only done by eukaryotic cells. One of the modifications is the excision of introns in RNA. An intron is a region of DNA that is part of the primary RNA transcript, but unlike exons, they are removed from the mature transcript prior to translation. <u>So, this remotion does not happen in prokaryotes because they just don't have introns</u>. Also, in prokaryotic cells. the translation and transcription machinery is coupled. So, the transcription and translation occurs simultaneously, there will be no remotion of introns then the protein will be synthesized differently, since the reading frame is changed. Remember that each codon (set of three nucleotides) codes for an amino acid. So if the gene sequence is different because certain sections of the gene have not been removed, the protein will be different, and probably it will not function. This option explains how the expression of an eukaryotic gene encoding a protein will differ if the gene is expressed in prokaryotic cells.

d. The genetic code is the set of rules that defines how a sequence of nucleotides in RNA is translated into a sequence of amino acids in a protein. This code is common to all living organisms, although there are small variations, and it has a unique origin and is universal.  So, the code defines the relationship between each sequence of three nucleotides, called a codon, and each amino acid.  The sequence of genetic material is composed of four distinct nitrogenous bases, which are represented by letters in the genetic code:

  • Adenine (A)
  • Thymine (T)
  • Guanine (G)
  • Cytosine (C)
  • Uracil (U), only in RNA (instead of T)

So, the genetic code is the same for eukaryotes and prokaryotes. So this option is not true.

7 0
3 years ago
This is a simple sugar that provides energy to organisms.
rewona [7]

Answer:

gluclose

Explanation:

8 0
3 years ago
Select the reasons why organisms are classified. Check all that apply.
igor_vitrenko [27]

Answer:

<u>A, C, D, E</u>

Explanation:

i took the test on edge

4 0
3 years ago
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How many stops can you potentially make on your trip? Why?
Alecsey [184]
It depends on where your going and how many people are going to the trip. But in my opinion I think about 3 times because you need to make stops when you need to use the restroom and when your hungry.




Sorry if I am not right :(
I hope I helped you have a great day :)
3 0
3 years ago
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