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3 years ago

Are the organelles that process coded genetic messages and assemble amino acids into proteins

Biology

1 answer:

g100num [7]3 years ago

5 0

Answer

Ribosome is an imporatnat cell organelle that play a key role in protein synthesis.

Discovery

Ribosome was discovered by <em>Palade</em> in 1955.

Structural composition

Chemically it is composed of an equal amount of rRNA and proteins, thats why it is also known as ribonucleoprotein.

Sub units of ribosomes

Ribosome is composed of two sub units one is smaller and the other one is larger. Both units are attached with each other with help of Mg atom.

Size of ribosome

In prokaryote the ribosome size is 70S, while in eukaryotes its size is 80S.

Polysome

When many ribosomes are attached to one mRNA strip it is called polysome or poly ribosome.

Role of ribosome

Ribosomes are the sites of synthesis of protein from amino acids.

Mechanism

mRNA which is the exact copy of DNA and formed in transcription come out from nucleus and attached to ribosomes. Now tRNA catch amino acids and come toward ribosome where its anti code match with genetic code of mRNA and then bonded to it. In this fashion a lot of amino acids are accumulated which make bonds with each others. Thus message present on mRNA in the form of genetic codes convert into protein through the process of transliteration.

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________ is a tissue membrane positioned in thin cavities between bones in movable joints.

mrs_skeptik [129]

The correct answer is "synovial membrane." The synovial membrane is a tissue that primarily produces synovial fluid between the joints which serves as a lubricant. Apart from making synovial fluid, it lines joint cavities, tendon sheaths, and the bursa which is a sac filled with fluid that is located between the tendons and the bones.

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4 years ago

The basic difference between dense irregular and dense regular connective tissues is in the amount of elastic fibers and adipose

grin007 [14]

"The basic difference between dense irregular and dense regular connective tissues is in the amount of elastic fibers and adipose cells present. "

-False Statement.

Explanation:

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3 years ago

When a cell is in equilibrium with its environment, which of the following processes occurs for substances that can diffuse thro

Ronch [10]

Answer:

The correct answer is A.

Explanation:

Diffusion is the net movement of a substance from a region of higher concentration to a region of lower concentration. The difference in concentration between two environments creates a concentration gradient which is what drives diffusion. Therefore, this movement does not require aid such as extra energy molecules for active transport or integral membrane proteins for directed movement, hence the answer is not B nor C. If the cell is in equilibrium with its environment, it means that the concentration of substances inside the cell is equal to the concentration outside the cell, and any movement that takes place will be random movement of substances across the plasma memberane. Movement in the cell will not cease as the cell is still active. Therefore, the answer cannot be D either.

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3 years ago

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Describe the type of plants that serve as pioneer species, intermediate species, and climax community species in secondary succe

MissTica

In secondary succession, the pioneer species are plants that are adapted to exploit disturbances rather than bare rock. They typically include plants such as grasses, birch trees, and fireweed. Organic matter from the pioneer species improves the soil so other trees and plants can move into the area.

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miss Akunina [59]

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