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musickatia [10]
3 years ago
11

Name the two transport processes that allow large substances to cross the plasma membrane

Biology
1 answer:
guajiro [1.7K]3 years ago
5 0

Transport of small molecules through the cell membrane can be:

1. Passive transport -no energy required

• Diffusion is the movement of molecules down the gradient (from higher to lower molecule concentration). It can be simple or facilitated with the help of membrane transport channel.

2. Active transport-energy required, against the gradient

• Primary active transport which directly uses ATP as energy source

• Secondary active transport-not direct use of ATP, involves more transport substances

On the other hand, large molecules use different mechanisms for cell membrane transport:

• Exocytosis-transport of the large molecule from the cell; molecules for the transport are packed inside the vesicles which then fuse with the plasma membrane and release their contents to the outside of the cell

• Endocytosis- transport of large molecule from outside the cell to the inside by engulfing it with the cell membrane.

Both of them are type of vesicle active transport.

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Can someone help me with this, please? <br><br> What are the eight major mineral groups?
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Answer:

calcium, iron, magnesium, potassium, chloride, zinc, sodium, sulfur

Explanation:

4 0
3 years ago
As a ribosome translocates along an mrna molecule by one codon, what happens after it?
erastova [34]

Answer:

The tRNA is released from the E site of the ribosome and the elongation process finishes while the termination process starts.

Explanation:

When the translocation process is finished the tRNA that is in the E site  of the ribosome is released and the A site of the ribosome reads a stop codon in the mRNA in order to finish the elongation process and start with the termination process.  In the termination process  a termination factor joins the stop codon, the ribosomal subunits split apart, the protein and the tRNA dissociate from one another and the tARN is not in the P site of the ribosome anymore.

4 0
3 years ago
1. In which way does the circulatory system rely on the skeletal system? (1 point)
german

Answer:

The correct option is Blood cells are produced in bone marrow.​

Explanation:

Skeletal system can be described as the system which comprises of all the bones and joints of an organism. The main function of the skeleton system is to provide support and protection to the organism.

The circulatory system can be described as a system which comprises of the heart, blood vessels and blood. This system is mainly involved in the transportation of substances like oxygen, nutrients etc in the body.

The skeletal system interacts with many other systems of the body and helps them perform their functions. For example, the skeletal system interacts with the muscular system so that a muscle can contract and relax.

The skeletal system interacts with the circulatory system by producing blood cells in the bone marrow. Red blood cells, as well as white blood cells, are produced by this process.

5 0
3 years ago
blank molecules make up proteins A. Carbohydrate. B. carbon dioxide. C lipid. C amino acid D water or E. hydrogen
Mademuasel [1]
The answer is A
(don't quote me on it)
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3 0
3 years ago
I am useful for a fast source of energy.
Hunter-Best [27]
I'm a carbohydrate and I'm useful for a fast source of energy.
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