Which of following is not essential part of virus?

Answers

Answer 1

Answer:

Envelope is not essential part of virus (option B)

What is virus?

A virus is a small, infectious agent that can replicate only inside the cells of living hosts. Viruses are not considered living organisms because they do not have their own metabolism or cell structure.

The essential parts of a virus are:

Nucleic acid: This is the genetic material of the virus, which can be either DNA or RNA. The nucleic acid carries the instructions for making new viruses.

Capsid: This is the protein coat that surrounds the nucleic acid. The capsid protects the nucleic acid and helps it to attach to host cells.

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What is the definition of a Nucleolus?

Answers

The Nucleolus helps function the cell.

Doctors do not administer vaccinations to people who are too sick. Which best explains why? A. The weakened or dead form of the pathogen may not have any effect on sick people. B. The weakened or dead form of the pathogen may have a fatal effect when it is combined with medication that the sick people are taking. C. The digestive systems of sick people may be negatively affected by the weakened or dead pathogen. D. The white blood cells of sick people may not be able to efficiently handle the weakened or dead form of the pathogen.

Answers

The Correct answer is option D

When a person is sick then it means that its immune system is already weak and the white blood cells of sick people do not work efficiently.

In this case if the body is administered with vaccination then there are chances that the person might die or become adversely sick.

Vaccination is given to evoke immune response by the help of White blood cells and if it is already not working efficiently then the vaccine can make the make person more ill.

D. If you give someone a vaccine while they are sick the body might not be able to handle both "infections"

What term describes an early kind of biologist who made and recorded observations about organisms in nature?

Answers

The term being referred to in this item is the naturalist. They study the natural environment. They generally have a broad studied things with broader range of interest than the particular specialty. Some of them may not have the proper training and do not hold a degree; however, they appreciate nature.

the word biologists.............

Give three functions of the cell surface membrane. (plasma membrane)

Answers

I can help with one but not 3... The Cell membrane can be used to help protect the inner parts of the cell such as the, mitochondria, cytoplasm, endoplasmic reticulum. (List more).

What do anaerobic organisms have in common with photosynthetic organisms?A.) They both appeared on Earth at about the same time.
B.) They both can only exist as single-celled organisms.
C.) They both need an energy source in order to survive.
D.) They both produce carbon dioxide as a waste product.

Answers

Ans is option C. They both need an energy source in order to survive.

Energy is an absolute necessity to survive on this earth. All living organisms need energy be it anaerobic or photosynthetic. Photosynthetic organisms can make their own food in the presence of sunlight by photosynthesis and harness energy from it. Anaerobic organisms can also make their own food in the absence of sunlight with the help of inorganic molecules like hydrogen sulfide (H2S), ammonia (NH3), sulphur (S) etc.

Its just that anaerobic organism's way of harnessing energy is different from those of aerobes/photosynthetic organisms but they need energy source for sure.

Where are the proteins for a cell made?

Answers

The proteins for a cell made in the cells ribosomes

Further explanation

Proteins are made inside the cells. Protein synthesis is the condition where a cell makes a protein. The instructions how to make a protein are held in DNA molecules inside the cell nucleus. The two major stages in making a protein are called transcription and translation.

Transcription is when the cell makes a copy or "transcript" of the DNA. The copy of DNA is called RNA. It is used in the next step, which is called translation.

The next step in making a protein is called translation, where the RNA is converted or "translated" into a amino acids sequence that makes up the protein.

The proteins for a cell made in the cells ribosomes.

When the cell needs to make a protein, mRNA created in the nucleus. Then mRNA is sent out of the nucleus and to the ribosomes. When it is time to make the protein, the two subunits come together and combine with the mRNA. Then the subunits lock onto the mRNA and it start the synthesis of protein.

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Answer details

Grade: 9

Subject: biology

Chapter: proteins

Keywords: transcription, translation

The ribosomes are the organelles in which the proteins are made. Except for red blood cells (RCBs), all the other cells in the body make protein as each cell is made up of protein. The DNA present in the nucleus instructs the ribosomes in the cells to synthesize proteins.

Further Explanation:

The ribosomes are involved in the synthesis of proteins by taking part in the translation process. During translation, the nucleotide triplet or codon sequence present in the messenger RNA is read by the ribosome and translated into an amino acid sequence to form proteins.

The ribosomes are composed of one large subunit which creates a polypeptide chain that links the amino acids together and a small which reads the codon sequence in the mRNA. They are present in both eukaryotes and prokaryotes. The prokaryotes have no membrane-enclosed organelles, therefore the ribosomes are found floating free in the cytosol. While in eukaryotes, the ribosomes are present within the nucleus, surrounding the endoplasmic reticulum, as well as free ribosomes in the cytoplasm of the cell.

In eukaryotes, the large and the small subunit of the ribosome has been identified as 60S and 40S subunit respectively whereas, 50S and 30S are the respective large and small subunits present in the prokaryotes.

The overall protein synthesis involves two processes: transcription and translation. During transcription, the information present in the DNA is copied and transcribed into mRNA. This mRNA sequence is used during translation to be translated into desired protein.

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Answer Details:

Grade: High School

Subject: Biology

Chapter: Protein Synthesis

Keywords:

Ribosomes, protein synthesis, translation, mRNA, codon, membrane-enclosed organelles, prokaryotes, eukaryotes, transcription.

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