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
wolverine [178]
3 years ago
7

Select the best description of the negative selection process of lymphocyte maturation.

Biology
1 answer:
Studentka2010 [4]3 years ago
5 0

Answer:

B) removal of lymphocytes that react with "self" cells

Explanation:

By negative selection, we mean to say that the lymphocytes which are reacting with self cells too strongly must undergo apoptosis otherwise they will cause auto-immunity which will lead to destruction of self cells.

Before negative selection, the naive lymphocytes undergo positive selection during which they are allowed to interact with MHC-I or MHC-II. This kind of selection is necessary so as to ensure that the selected lymphocytes have affinity towards MHC molecule for generation of effective immune response whenever it is required. All those cells that do not recognize self antigen undergo apoptosis because they are useless and the lymphocytes which recognize MHC moderately are selected for the next stage which is negative selection.

Once these lymphocytes have passed test for positive selection, they have to undergo test for negative selection. All those lymphocytes which are interacting very strongly with self antigen are rejected and finally undergo apoptosis.

You might be interested in
DONT ANSWER ALL THE PAGES JUST ANSWER THE LAST 2 PLAGES<br> giving brainliuest
Nataliya [291]

Answer:

31. Seatbelts lock in place to make sure you don't go flying into the windshield.

32. Friction causes the soccer ball to slow down. If we were to kick a soccer ball in space, where there is no friction, it would keep on rolling until it eventually hits something or goes out of sight.

33. Heavier loads will make the vehicle move off of the table. The heavier the weight, the quicker the  vehicle will roll. Loads that are something very similar or lighter than the vehicle won't make the vehicle move by any means.

34. Gravity is the power pulling the piano toward the Earth.

Friction would happen with an unpleasant surface, making it a lot harder to push the piano up the ramp.

35. Wagon C

Wagon C has the least boxes and minimal measure of mass, making it simplest to move.

36. I would move the crates so every cart has a similar measure of boxes, making them equivalent in mass. This would make them all take a similar measure of power to move them.

Explanation: I have the answer key

7 0
3 years ago
Which is not a factor used to divide the ocean into distinct marine life zones?
nignag [31]
Latitude is not a factor in marine life divisions.
5 0
3 years ago
Read 2 more answers
Explain how a testcross can provide evidence for or against linkage.
MrRa [10]

Answer:

Testcrosses clarify linkage because each phenotypic class of progeny corresponds to each gamete type produced by the dihybrid parent.

Explanation:

  • A test cross involves the crossing of an individual with another phenotypically recessive individual so as to determine the zygosity of the former by analyses of the proportions of offspring phenotypes.
  • In order to determine linkage, the test cross shows that if the parentals are more than the recombinants, we can say that the two genes such as b and c  are genetically linked and therefore, they must be on the same chromosome.
  • Also, the test-crosses help to find out which alleles came from which parent.
  • By setting up testcrosses in which one parent is homozygous for the recessive alleles of both genes,we can analyze the gene combinations received in the gametes from the other, doubly heterozygous parent.
7 0
3 years ago
I was just wondering, if atoms are made of protons, neutrons, and electrons, what are these three building blocks of the atom? I
Rashid [163]
Protons, neutrons, and electrons are the three building blocks of an atom.
4 0
3 years ago
Read 2 more answers
Which statement accurately describes the energy needs for photosynthesis and cellular respiration?​
Nonamiya [84]

Answer:

solar energy is needed for photosynthesis, and chemical energy in the form of glucose is needed for cellular respiration

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is not an adaptation of California thrashers to life in the chaparral biome?
    15·1 answer
  • _________ is the change from liquid to gas. when the body perspires or gets wet, evaporation of the perspiration or other liquid
    6·1 answer
  • Sexually transmitted infections (STIs) are a significant problem in the world. The symptoms described in the case thus far are f
    11·1 answer
  • How are oxygen and nitrogen molecules different from the water molecules?
    6·1 answer
  • A true hypothesis Astarte with word ________ and list the IV , continues with ______ and states the DV , and closes with _____ t
    8·1 answer
  • A student draws a fence with several gate as part of a model of cellular transport explain what defence indicates represent blam
    10·1 answer
  • (GIVING BRAINLIEST!!)
    5·1 answer
  • Which body system matures during childhood?
    12·2 answers
  • Explain why plant cells do not "diminish" in overall size when they lose water.
    11·1 answer
  • Which specific process in the light dependent reactions produce oxygen and hydrogen ions? A- The formation of NADPH
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!