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
malfutka [58]
3 years ago
12

What is NOT part of the present-day solar system? A. the Sun B. the planets C. the solar nebula D. the planetary moons and rings

Biology
1 answer:
Wewaii [24]3 years ago
6 0
The answer is C. The Solar Nebula
You might be interested in
The structure of the cell membrane allows it to be selectively permeable. What is the name for the larger, brown structure in th
Anika [276]

Explanation:

B) protein channel

Lipids are composed of fatty acids which form the hydrobic tail and glycerol which forms the hydrophilic head; glycerol is a 3-Carbon alcohol which is water soluble, while the fatty acid tail is a long chain hydrocarbon (hydrogens attached to a carbon backone) with up to 36 carbons.

Their polarity or arrangement can give these non-polar macromolecules hydrophilic and hydrophobic properties. Via <em>diffusion,</em> small water molecules can move across the phospholipid bilayer acts as a semi-permeable membrane into the extracellular fluid or the cytoplasm which are both hydrophilic and contain large concentrations of polar water molecules or other water-soluble compounds. The hydrophilic heads of the bilayer are attracted to water while their water-repellent hydrophobic tails face towards each other- allowing molecules of water to diffuse across the membrane along the concentration gradient.

Transmembrane proteins are embedded within the membrane from the extracellular fluid to the cytoplasm, and are sometimes attached to glycoproteins (proteins attached to carbohydrates) which function as cell surface markers. Carrier proteins and channel proteins are the two major classes of membrane transport proteins.

  • Carrier proteins (also called carriers, permeases, or transporters) bind the specific solute to be transported and undergo a series of conformational changes to transfer the bound solute across the membrane. Transport proteins spanning the plasma membrane facilitate the movement of ions and other complex, polar molecules  which are typically prevented from moving across the membrane.
  • Channel proteins which are pores filled with water versus enabling charged molecules to diffuse across the membrane,  from regions of high concentration to regions of lower concentration. This is a passive part of facilitated diffusion

Learn more about membrane components at brainly.com/question/1971706

Learn more about plasma membrane transport at brainly.com/question/11410881

#LearnWithBrainly

4 0
3 years ago
Exceptions to the Central Dogma of Molecular Biology”
Kruka [31]

Answer:

retroviruses

Explanation:

Retrovirus have an enzyme known as reverse transcriptase which allows them to synthesize DNA from RNA going against the central dogma of life which is the synthesis of RNA from DNA. This phenomenon is called teminism.

4 0
3 years ago
Read 2 more answers
The part of the brain that is responsible for balance is the _____. answers
quester [9]
The brain stem is the answer that you are looking for
5 0
3 years ago
Read 2 more answers
True or False. Atmosphere pressure increases with height.
goldenfox [79]

Answer:

True I'm pretty sure

Explanation:

4 0
3 years ago
The zygote is the only diploid cell in
gavmur [86]

Answer:

its either A or D.I remeber learning about this..Hope that helps

3 0
3 years ago
Read 2 more answers
Other questions:
  • What is an advantage of using nuclear power?
    11·2 answers
  • The process of ____________ increases genetic variability as it produces gametes for sexual reproduction.
    13·1 answer
  • .Enzymes chemical reactions.
    12·1 answer
  • Which sample has the most evenness among the species studied?
    13·2 answers
  • Why does the headless horseman carry his head under his arm geometry worksheet?
    6·1 answer
  • Which term best describes the protist shown above?
    8·1 answer
  • What is the difference between the one with a bunch of red dots (Anti Rh, Anti B) and the solid red circle (Anti A) I do not und
    10·2 answers
  • Which foodborne illness has a preventive vaccine
    6·2 answers
  • Need help answering this thanks.
    6·2 answers
  • In the citric acid cycle, the acetyl group of each molecule of acetyl-coa is converted into two molecules of ________.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!