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Daniel [21]
3 years ago
14

What is cell membrane

Biology
2 answers:
sdas [7]3 years ago
8 0

Answer: Cell membrane is layer which is present in all living cells. It is present under the cell wall but in some cases such as plant cells.

Explanation: It is composed of lipid bilayer and proteins embedded in it. Phospholipids, glycolipids and sterols is the composition. Its function is to protect the cell from extracellular environment. It is semipermeable membrane that js allow only selected molecules to pass.

liubo4ka [24]3 years ago
4 0

Answer: A cell membrane is a phospholipid bilayer that defines the external boundaries of cells and regulate the molecular traffic across the boundary.

Explanation: Cell membranes are flexible, self-sealing and selectively permeable bilayer of phospholipids with proteins embedded in the bilayer through hydrophobic interactions. Cell membranes are formed by the interactions of the hydrophobic tails of the phospholipids, the hydrophobic tails of the phospholipids face each other while their polar head groups face outward, thus forming a bilayer with a fluid hydrophobic core. The selective permeability of membranes makes them to retain certain compounds and ions within cells while excluding others. Cell membranes include an array of proteins specialized for promoting or catalyzing various cellular processes such as synthesis of lipids and certain proteins and the energy transductions in mitochondria and chloroplasts.

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Why do you think these cells are important for various body functions?
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Answer:

They are important because they help get the body funtion in many ways

Explanation:

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2 years ago
A birds newly grown feathers are called?
11Alexandr11 [23.1K]
Vaned feathers maybe?

5 0
3 years ago
_______ is an elastic protein that connects tubulin doublets in cilia and flagellae. the resultant bridges play an important rol
Firdavs [7]
Nexin

This is the elastic protein among tubulin doublets that link them together for ciliary and flagellae structures.
Cilia and flagella are cellular structures that facilitate movement of the cell from one area to another.

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3 0
3 years ago
CUGGCUAC
Degger [83]

Template DNA  5' GATTCAGAGA 3'

Complemntary strand    3' CTAAGTCTCT 5'  

5'   GAUUCAGAGA3'  mRNA strand

codes of mRNA GAU, UCA, UAG

Explanation:

5' GATTCAGAGA 3' is the example of DNA strand having the sequence.

The DNA strand is leading strand and is in 5' to 3' direction

the complementary DNA strand is formed in 3'to 5' direction as the strand of 5' to 3' acts as a tempelate for complementary strand.

During replication which is semiconservative a new template is formed by adding the nucleotides to the growing strand.

DNA synthesis always takes place in 5' to 3' direction.

5' GATTCAGAGA 3'

3'  CTAAGTCTCT 5'    Complemntary strand

Transcription is a process in which DNA sequence is transcribed into mRNA which carries codes for amino acids.

 The 5' to 3' strand is called sense strand

3' to 5' strand is called antisense strand. mRNA is transcribed from antisense strand and is a copy of sense strand.

so the transcribed DNA strand as mRNA will be shown as:

3'  CTAAGTCTCT 5'

5'   GAUUCAGAGA3'  mRNA strand

GAU codes for = Aspartate

UCA codes for = serine

GAG code for = glutamate (when due to mutation GAA will become GAG)

A will not code as it is not in triplets.

8 0
2 years ago
Hi everyone,What is glacial lake?How is it formed?​
mash [69]

Glacial lakes are bodies of water that are influenced by the presence of glaciers. ... Glacial lakes are common features around the margins of glaciers and ice sheets, and often evolve from ice-contact lakes into ice-distal lakes as glaciers and ice sheets margins retreat and become spatially separated from the lake.

6 0
2 years ago
Read 2 more answers
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