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
Vesna [10]
3 years ago
7

Which of these is a receptor molecule? A. cell membrane with an integral molecule marked B. There is a specific recess in this m

olecule on the extracellular side. C. A molecule in the intracellular fluid, whose shape is identical to this recess, is marked A. D. Letter C marks a molecule connected to molecule B and is located in the cytoplasm. E. Letter D marks a molecule in the cytoplasm, near molecule C. F. Letter E marks a molecule in the cytoplasm located below molecule D.
Biology
1 answer:
IrinaK [193]3 years ago
5 0

Answer:

B molecule.

Explanation:

Receptor may be defined as the molecule to which the ligands or the signalling molecule binds. The binding of the molecules with its receptor helps in initiating the signalling cascade of the body.

The molecule that are marked B can acts as receptor because the receptor may present on the cell membrane or in the cytosol or in the nucleus. The B molecule shows the recess marked with the other molecule.

Thus, the correct answer is B.

You might be interested in
HELP ME PLEASE
kolbaska11 [484]

Explanation:

The correct answer here is C

7 0
2 years ago
Help me with this question plzz!​
PolarNik [594]

Labeo = gills

Dolphin= pisces

Tadpole = hibernation

snake= internal fertilization

Eagle = aerial mode of life

Human = mammals

3 0
3 years ago
A population of mice exists with both brown and black varieties. The mice live among sandy beach dunes where hawks prey on the m
fomenos

Answer:

Adaptation

Explanation:

In this case predation is the selection pressure for natural selection in the mice population. Because the black mice stand out against the brown sand dunes backdrop, they are easily located and predated on by the hawks. Therefore, black mice have a lower chance (compared to brown mice) to reach reproductive age and pass down their genes to the next generation. With subsequent generations, therefore, there will be more and more brown mice in the population.

4 0
3 years ago
Read 2 more answers
A typical PCR program is listed below. Define what is happening to promote DNA in steps 2‐4 below amplification (i.e., what happ
saveliy_v [14]

In step 2: Denaturation of the double-strand occurs.

In step 3: Annealing of the primer to the single strands.

In step 4: Extension or elongation takes place in this step.

Explanation:

In the PCR program an enzyme Taq Polymerase is used because it can withstand high temperature without altering its functions.

PCR is required for the amplification of DNA into multiple copies for experimental purpose. The artificial environment is created to form new DNA molecules from the sample in question.

The first step in replication is the opening of the double helix which is done by temperature treatment in PCR. The temperature would be 90 degrees for some 30 sec to two minutes.

The next step of primer annealing would be done at 52 degrees, this is the primer melting temperature.

The elongation of the DNA strand to be synthesized will take place at 72 degrees as Taq Polymerase can withstand that temperature.

Nearly one million copies of DNA will be made after 30 cycles of PCR.

PCR products can be stored at 4 degrees for some two months.

3 0
3 years ago
The peripheral nervous system is made up of two systems; the _____________ nervous system controls muscle movement and the _____
Paladinen [302]

Answer is somatic; autonomic

The peripheral nervous system is made up of two systems; the somatic nervous system and the autonomic nervous system.The somatic nervous system is under voluntary control and transmits signal from brain to muscles, whereas he autonomic nervous system controls involuntary actions to regulate physiological functions such as working of cardiac muscles, bladder.

8 0
3 years ago
Other questions:
  • In the forest biome, tropical forests are characterized by the greatest diversity of species.
    7·2 answers
  • Which structures are found in the human female reproductive system?
    12·1 answer
  • Which statement about glaciers is true?
    9·2 answers
  • A student conducted an experiment to test whether talking to plants would help them to grow faster. The student talked to one gr
    9·2 answers
  • As a seedling , the strangler fig and host tree have a relationship that is described as commensalism . Why is commensalism a go
    13·1 answer
  • What can an epigenome do?
    8·2 answers
  • Someone please help!!!
    6·1 answer
  • Select the correct answer.
    14·1 answer
  • Using the diagram below, identify the ONLY portion of the nucleotide that is not the
    6·1 answer
  • Analyze the graph and identify some factors that may contribute to the rotifer population leveling off in the absence of water f
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!