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
kumpel [21]
3 years ago
12

. Explain how the structure of the plasma membrane makes it selectively permeable. What kinds of substances can pass through the

membrane? What kinds of substances cannot pass through the membrane without the assistance of proteins?
Biology
1 answer:
Yuliya22 [10]3 years ago
6 0
The plasma membrane is made out of structures called phospholipids that form a phospholipid bilayer. The tails of the phospholipids are hydrophobic (water-hating) while their heads are hydrophilic (water-loving.

Because they are so tightly packed, large molecules such as glucose can’t get into the cell without the help of protein channels. However, non-polar molecules such as carbon dioxide and oxygen can easily pass through.
You might be interested in
What are possible effects of long-term environmental changes? Check all that apply.
Ludmilka [50]

Answer:

Answer is only B: Extinction

Explanation:

Long-Term is the key word. Edge test says B only.

3 0
3 years ago
Read 2 more answers
When comparing DNA polymerase I and DNA polymerase III functions, we find that Group of answer choices both DNA polymerases have
ser-zykov [4K]

Answer:

<h2>Both DNA polymerases have exonuclease activity.</h2>

Explanation:

1. DNA polymerases are enzymes which replicates DNA during S phase of cell cycle.

2.Both eukaryotes and prokaryotes contain DNA polymerase enzymes.

3. As here, DNA pol I and DNA pol III functions; both DNA polymerases have exonuclease activity as, If the polymerase detects an incorrectly paired nucleotide it has been added, it will remove and replace that incorrectly paired nucleotide with correct  nucleotide.

4. Both  DNA polymerase I and III adds a nucleotide to the 3' end of a polynucleotide.

5 0
3 years ago
Describe one difference between PCR and recombinant DNA technology
Maru [420]

rDNA technology is technology of creating new combination of DNA While Polymerase chain reaction (PCR) is one of the techniques used in r DNA technology for amplification of particular DNA fragment. Polymerase chain reaction (PCR) is used in molecular biology to amplify a single copy or a few copies of a segment of DNA across several orders of magnitude, generating thousands to millions of copies of a particular DNA sequence.





8 0
3 years ago
Read 2 more answers
A bacterium will construct different proteins to metabolize the sugars lactose or glucose, depending on which one it detects in
andrew11 [14]
Just like other cells, the part of the bacterium that is able to interact with its outside environment is its cell membrane. Generally, the main function of the cell membrane is for barrier and protection. This decides which molecules will be allowed to permeate or not. Hope this helps.
5 0
3 years ago
Some can force their stomachs outside their mouths to digest prey
ddd [48]

Answer:

A. Sea stars

Explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • The three main types of articulations within the human body are?
    6·1 answer
  • How is mass conserved in photosynthesis?
    11·1 answer
  • What is a eukaryote, and when did eukaryotes first arise?
    11·2 answers
  • Black footed ferrets are native to the great plains. which factor would decrease an area's carrying capacity for these ferrets?
    9·1 answer
  • Which of the following is the correct type of boundary that is represented in the
    14·2 answers
  • How is genetic variation related to selective breeding
    12·1 answer
  • How do spores help the survival of spore-bearing plant?
    10·1 answer
  • Together the entire process of aerobic respiration (Glycolysis, Krebs
    15·1 answer
  • DNA is made up of (nucleotides / nitrogenous bases), joined by covalent bonds between the (adenine / guanine / thymine/ deoxyrib
    11·1 answer
  • During embryonic development, which structure temporarily takes on the function of the lungs?.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!