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
almond37 [142]
2 years ago
11

Which event marks the beginning of DNA replication?

Biology
2 answers:
GrogVix [38]2 years ago
8 0
DNA replication begins when something called Helicase (an enzyme) unwinds the helix structure of the DNA. It does this so that Primase can then come along and set down an RNA primer.
Gemiola [76]2 years ago
8 0
The beginning of DNA replication, is B. Unwinding of the helix. Hope this helped!
You might be interested in
1.3.4 How can teenage pregnancies be avoided? List FIVE ways.​
Anika [276]

Answer:

Don't have sex. 5 points isnt a lot so I am not spending alot of time on it.

8 0
2 years ago
Read 2 more answers
Click on all the types of reproductive isolating<br> mechanisms (RIMs). *
Mice21 [21]

Answer: Behavioral isolation.

Mechanical isolation. ...

Temporal isolation

6 0
2 years ago
What is the volume of 0.25 mol of ammonia gas at 1.00 atm and 273 K? (R= 0.0821 Latm/molK)What is the volume of 0.25 mol of ammo
ICE Princess25 [194]

Answer:

5.6L

Explanation:

Given parameters:

number of moles  = 0.25mol

pressure on gas  = 1atm

temperature  = 273K

Gas constant R = 0.0821Latm/molK

Unknown:

Volume of gas  = ?

Solution:

Using the ideal gas equation, we can solve this problem. The equation is a combination of the three gas laws: Boyle's law, Charles's law and Avogadro's law.

It is mathematically expressed as;

             PV = nRT

where P is the pressure

           V is the volume

          R is the gas constant

          T is the temperature

          n is the number of moles

All the parameters are in the appropriate units and we simply solve for the volume of the gas;

                1 x V = 0.25 x 0.0821 x 273

                      V  = 5.6L

4 0
3 years ago
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
2 years ago
Does anyone want to get payed good money to do my homework?
taurus [48]
Ya i’ll do it for you
8 0
3 years ago
Other questions:
  • What are two advantages and disadvantages of sexual reproduction?
    6·1 answer
  • during the fall season, a lot of leaves on the trees turn lighter green/yellow and then orange/ red. What causes the color to be
    15·1 answer
  • Select all that apply. The two bones of the lower arm are _____. radius humerus ulna tibia femur
    12·2 answers
  • 1. What are some of the abiotic factors that scientists monitor when dealing with stream ecosystems?
    5·1 answer
  • What is a cell with two pairs of each set of chromosomes
    6·1 answer
  • The process of cellular respiration begins with molecules of _______ and ends with the production of _______.
    15·2 answers
  • IN E E D H E L P U R G E N T L Y P L E A SE TwT
    7·2 answers
  • Need rn!!
    8·2 answers
  • Explain the physics of light as it relates to photosynthesis. What is a pigment, what is a photon?
    15·2 answers
  • How much weight can a Electromagnet carry
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!