1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aev [14]
3 years ago
9

39. What makes up proteins and what bonds them together?

Biology
1 answer:
icang [17]3 years ago
8 0
Proteins are biological polymers constructed from amino acids joined together to form peptides. These peptide subunits may bond with other peptides to form more complex structures. Multiple types of chemical bonds hold proteins together and bind them to other molecules. Take a closer look at the chemical bonds responsible for protein structure.
You might be interested in
A sac that stores water salt,and other materials for the cell is called a
Alex777 [14]
Vacuoles are <span>large saclike, membrane enclosed structure - store materials like water, salts, protrins, and carbohydrates - like a storage unit</span>
6 0
3 years ago
Read 2 more answers
3. a) What are three ways for materials to move in and out of cells? (6 points)
zalisa [80]
Answer: Diffusion, Osmosis and Active Transport
Explanation:
The processes of transport between the cell and the external environment can be grouped into groups: Passive Processes - occur through the plasma membrane, without energy expenditure to the cell, to equalize cell concentration with the external medium. Examples of such processes are diffusion, facilitated diffusion and osmosis. Active processes - occur through the plasma membrane, with energy expenditure, maintaining the concentration difference between the cell and the external environment. For example, sodium-potassium pump. Diffusion In diffusion, particles move from the highest concentration medium to the lowest concentration medium, so that it can be distributed throughout the medium. Therefore diffusion is a process called passive transport. Facilitated Diffusion is the passive transport of substances across the plasma membrane, without wasting cell metabolic energy, allowing the passage of substrates (molecules or ions) from a more concentrated to a less concentrated medium through specific mediation of carrier proteins, enzymes carriers or permeases along the plasma membrane. This process is mainly used to transport carbohydrates, amino acids, vitamins and some ions: sodium, potassium, calcium. Osmosis is the name given to the movement of water between media with different concentrations of solutes separated by a semipermeable membrane. It is an important physicochemical process in cell survival.
The sodium-potassium pump is an example of active transport. Sodium concentration is higher in the extracellular environment while potassium is higher in the intracellular environment. Importantly, the energy required for this change comes from the breakdown of the ATP (adenosine triphosphate) molecule into ADP (adenosine diphosphate) and phosphate. The sodium (Na +) ion in the cytoplasm is pumped out of the cell. In the extracellular medium, the potassium ion (K +) is pumped into the internal medium. If there was no efficient active transport, the concentration of these ions would equal. Thus, the sodium and potassium pump is important as it establishes the difference in electrical charge between the two sides of the membrane that is critical for muscle and nerve cells and facilitates the penetration of amino acids and sugars.
5 0
3 years ago
PLZ HELP!!!!!!!!!!!!!!!!
Leni [432]

Answer:

I see this was posted a week ago, do you still need help with this question?

Explanation:

8 0
3 years ago
On a molecular level, explain what happens when a kite lifts into the air?
NeTakaya

The difference in air pressure which is created by the molecules in air help to move kite up into the air.

<u>Explanation:</u>

When air moves faster, pressure of air becomes less. Air moves at a faster speed above the kite than below it and so its pressure is less on top of kite. The air pressure below kite is less. This difference in pressure results in uplifting of kite. Molecules of air with high pressure exerts more force on kite from bottom and thus pushing it up in air.

The greater is the difference between air pressure above kite and air pressure below kite, greater is the amount of force exerted on kite and hence, it reaches a greater height.

7 0
3 years ago
Describe what will happen to the wave as it goes through the hole. what do we call this?​
kari74 [83]

Diffraction occurs when a wave moves through an opening in a barrier. This causes the wave to change direction and spread out.

Waves can behave in three different ways depending on the obstacles they encounter. They can reflect, refract or diffract. In diffraction, waves such as sound, light or water either bend around small objects that obstruct their passage or spread out as they travel through a gap in the barrier.

The degree of diffraction forms a direct relationship with wavelength. It generally increases as wavelength increases. Conversely, the amount of bending lessens as wavelength decreases. However, if the opening of the barrier is smaller than the wavelength, the effect of diffraction is not easily observed. Hope this helps.

5 0
2 years ago
Other questions:
  • The breaking of a rock along a plane of weakness is called _____.
    5·2 answers
  • Which are units used to express volume
    7·1 answer
  • How do fossils provide evidence of change from the earliest life forms to those alive today
    6·1 answer
  • How do you know which bases to use when you transcribe the DNA sequence to mRNA codons
    13·1 answer
  • How is the inside of the nucleus connected to the cytosol? Why is this connection vital for the cell?
    6·1 answer
  • Answer ASAP please pic attached
    13·2 answers
  • Referring to plants that produce offspring of the same variety when they self-pollinate.
    14·1 answer
  • Our food supply chain is dependent on the practice of safety at all levels.
    14·1 answer
  • Prior to its export from the nucleus, what modifications must be made to a mRNA molecule in eukaryotic cells?
    13·1 answer
  • Determine the temperature of the bar on the fahrenheit scale.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!