BIOLOGY HIGH SCHOOL

Why does the cell need to carry out transcription before it can begin translation

Answers

Answer 1
Answer: The cell needs to carry out transcription before it can begin translation because transcription is the first step of gene expression, whereby the segments of DNA is copied into RNA in other words mRNA by enzymes RNA polymerase.
 Both RNA and DNA are nucleic acids and they use base pairs of nucleotides as complementary language. It is during transcription when DNA sequence is read by an RNA polymerase which produces antiparallel RNA, complementary strand called primary transcript.
Transcription unit is the stretch of DNA which is transcribed into an RNA molecule and it encodes a protein then the transcription produces messenger RNA or mRNA the mRNA serves as a template for synthesis of proteins through the process of translation.
The transcribed gene may encode for either ribosomal RNA or rRNA, non-coding RNA for example microRNA. RNA performs a fundamental role in functions within a cell whereby it helps to regulate, synthesize, and process proteins.
Answer 2
Answer:

Answer:

The cell needs to carry out transcription before it can begin translation because transcription is the first step of gene expression, whereby the segments of DNA is copied into RNA in other words mRNA by enzymes RNA polymerase.

Explanation:

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Which option correctly describes the structure of cell walls? A)Cell walls are rigid. They block the movement of all molecules. B)Cell walls are flexible. They block the movement of all molecules. C)Cell walls are rigid. Small molecules like water or oxygen can pass through them. D)Cell walls are flexible. Small molecules like water or oxygen can pass through them.

Answers

Answer:The correct option is C) Cell walls are rigid. Small molecules like water or oxygen can pass through them.

Explanation:

Cell walls are found in plant cells and some other organisms. They provide structural support and protection to the cell. The cell wall is made up of a rigid material called cellulose, which gives it its strength.

Cell walls are permeable, meaning that they allow certain substances to pass through them. Small molecules like water and oxygen can pass through the cell wall via small pores or channels. However, larger molecules, such as proteins and carbohydrates, cannot pass through the cell wall.

This selective permeability of the cell wall allows the cell to control the movement of substances in and out of the cell, maintaining its internal environment. It also helps prevent the cell from bursting under osmotic pressure.

In summary, cell walls are rigid structures composed of cellulose. They are permeable, allowing small molecules like water and oxygen to pass through, while blocking larger molecules.

What is a fertilized egg called

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It's called a zygote 

A fertilized egg is called a zygote.

Hope this helps :)

Which is an activity that increases the genetic variation within a population of earthworms

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The answer is Evolution.

The increase of genetic among the population of earthworms is because of evolution. Evolution refers to the process in which the genetic traits in a population of organism changes over time. It could also be natural selection. According to Darwin's theory of evolution, surviving organisms are well adapted to their environment.

When you are exposed to disease-causing germs, which type of tissue is your first line of defense

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your epithelial (skin).

Which describes the basic structure of a fatty acid

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A fatty acid is a carboxylic acid with a long aliphatic chain. It can be saturated or unsaturated. In order to describe correctly the fatty acid, the length of the carbon chain should be given, the number of double bonds and the exact position of the double bonds.

And increase in food and a decrease in predators would most likely

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An increase in food and decrease in predators would most likely create a habitat that would be over run by animals. Without predators these animals will take over the area and become a nuisance to people and other animals in the area. One example would be the starling in New York city. They were released in Central Park and had no natural predators so they became to flourish and would invade and take over the area from other birds.
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