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
prohojiy [21]
2 years ago
14

Ribosomes are the RNA-protein enzyme complexes that synthesize proteins. There are no ribosomes inside the lumen of the secretor

y pathway. Instead, secreted and membrane-bound proteins are synthesized in the cytosol, but have short stretches of amino acids called "signal sequences" that target the newly-forming proteins to a special channel in the membrane of the ER that enables the movement of the newly-forming proteins into the ER. This "translocation" ceases if a protein sequence is reached that will be embedded in the plasma membrane. Protein synthesis will proceed, and the membrane-spanning sequence will eventually be embedded in the ER membrane. Which of the following features would such a transmembrane amino acid sequence have?
A. The amino acids would have mostly hydrophobic side-chains.
B. The amino acids would have mostly hydrophilic side-chains.
C.There's no way to predict the relative number of hydrophobic and hydrophilic side-chains in transmembrane amino acid sequences.
Biology
1 answer:
lara31 [8.8K]2 years ago
8 0

Answer:

mostly hydrophobic

Explanation:

A membrane is made of amphipathic molecules with the hydrophobic part pointing to the lumen and cytosol and the hydrophobic part (much bigger makes up most of the membrane) in the middle, the protein chains that are embedded in the membrane are thus mostly hydrophobic because the membrane is mostly hydrophobic and like likes like

You might be interested in
What part of phospholipid is hydrophobic
Stolb23 [73]

Answer:The tails

Explanation:

they face inward on the plasma membrane and are hydrophobic because they repel water.

7 0
3 years ago
Read 2 more answers
This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient.
faltersainse [42]

Answer:

Primary active transport

Explanation:

Primary active transport is the transport in which molecules are moved against their gradient, with direct use of ATP as an energy source. Na/K pump  is an example  of primary active transport: Na ions are transported out of cell, K ions are moved into the cell. This pumps maintain concentrations of those ions and also creates voltage across the cell membrane, which can be used for the secondary active transport of other molecules (e.g. glucose).

4 0
3 years ago
Read 2 more answers
When the land or oceans are heated unevenly,
MatroZZZ [7]

Answer:

i need help no really i need help too!

Explanation:

8 0
2 years ago
Read 2 more answers
Anemia is a blood disorder where there is a deficiency in the quantity of red blood cells and/or hemoglobin. Anemia can be inher
Tanya [424]
<span>A person chooses to not eat red meat, spinach, or other foods high in iron.</span>
5 0
3 years ago
Read 2 more answers
PLEASE HELP You must design a valid experiment to show that there are microorganisms in the air. What would be your dependent va
Komok [63]
You can carry out a test , 
1- take a sample of the air in a test tube 
2-add limewater to the test tube 
3- result : if it turns milky/cloudy it has microorganisms 
4- reason: because every microorganism respires , and so it produces Carbon dioxide . 
and limewater is the test to show the presence of Carbon dioxide . 


6 0
3 years ago
Other questions:
  • Which statement correctly compares the inheritance of blood type in humans and the inheritance of length of ears in corn plants?
    8·2 answers
  • When ice and snow move overland in compacted large quantities, they erode the soil and can change landforms. Which object create
    9·1 answer
  • What is not an ocean resource ?
    10·1 answer
  • Although carbon dioxide emissions are reduced, geothermal power plants release odor pollution that smells like rotten eggs. True
    9·2 answers
  • - ¿Qué ruta sigue cada uno DE LOS TRIGLICERIDOS en su afán de obtener energía?… ¡sí, energía llamada ATP! - Ruta metabólica que
    8·1 answer
  • There is a common misconception that traditional taxonomy is based on morphology, while cladistics is based on genetic data. How
    12·2 answers
  • What does removing Beta catenin do?
    8·1 answer
  • Rachel Carson wrote in Silent Spring, "The chemical war is never won, and all life is caught in the crossfire." Respond
    11·2 answers
  • How does the codon help determine the function of the protein it is coding for?.
    7·1 answer
  • Which parts of photosynthesis occur in the thylakoid membranes of the grana?.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!