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
eimsori [14]
3 years ago
5

What is the active site and what is it’s job

Biology
1 answer:
Grace [21]3 years ago
7 0

Answer:bcgfxytcfyvgubhnigyfdrse5rvguhbjnmk,lkpjoiuryrsxcvgfdse5drftgyhuiujhzv6a345y64665

Explanation:

You might be interested in
Which type of epithelium lines the stomach and intestinal tract?
blsea [12.9K]
A simple columnar epithelium<span> is a </span>columnar epithelium<span> that is uni-layered. In humans, a simple </span>columnar epithelium<span> lines most </span>organs<span> of the digestive tract including the stomach, small intestine, and large intestine. Simple columnar epithelia line the </span>uterus<span>.</span>
4 0
3 years ago
When would the largest adaptive radiation of species occur? A-during mass extinction events B-immediately before mass extinction
NNADVOKAT [17]
C. Immediately after mass extinction events D-50 million years after a background extinction  event.

C. Is The Answer!
7 0
3 years ago
Mitosis is divised into phases what phase of mitosis is shown in the diagram​
pashok25 [27]

metaphase I'm not sure but I think it is the answer

3 0
3 years ago
Read 2 more answers
Following antigenic stimulation, phosphorylation of _________ relieves inhibition of the transcription factor
Maru [420]

Answer: zap70, ITAM.

Explanation:

An antigen is any substance that is capable of stimulating an immune response by activating lymphocytes, which are the body’s infection-fighting white blood cells. Examples of antigens could be proteins that are part of bacteria or viruses or components of serum and red blood cells from other individuals, all of them are foreign antigens originated outside the body. However, there can also be autoantigens (which are self-antigens), originated within the body. In normal conditions, the body is able to distinguish self from nonself. <u>And the antigens that represent a danger induces an immune response by stimulating the lymphocytes to produce antibody or to attack the antigen directly</u>. This is called an antigenic stimulation of the immune system.

ZAP-70 (Zeta-chain-associated protein kinase 70) is a protein that is part of the T cell receptor, thereby it plays a critical role in T-cell signaling. When the TCR (receptor of T cells) is activated by the presentation of the specific antigen through the MHC, a protein called Lck acts to phosphorylate the intracellular CD3 chains and the ζ chains of the TCR complex, allowing the binding of the cytoplasmic tyrosine kinase, ZAP-70. Lck then phosphorylates and activates ZAP-70, which in turn phosphorylates another molecule in the signaling cascade called LAT (short for Linker of Activated T cells), a transmembrane protein that serves as an anchor site for several other proteins. The tyrosine phosphorylation cascade initiated by the Lck culminates in the intracellular mobilization of calcium ion (Ca2+) <u>and the activation of important signaling cascades within the lymphocytes.</u> These include the Ras-MEK-ERK pathway, which is based on activating certain transcription factors such as NFAT, NFκB and AP-1. These transcription factors regulate the production of of certain gene products, most notably cytokines such as interleukin-2 that promote the long-term proliferation and differentiation of activated lymphocytes.

The ITAM motifs (immunoreceptor tyrosine-based activation motif) are sequences of four amino acids present in the intracellular tails of certain proteins that serve as receptors within the immune system. Thus, <u>some receptors such as the TCR have ITAM sequences that, when activated, trigger an intracellular reaction based on consecutive phosphorylations</u>.  Kinases are recruited for this purpose.

So, ZAP-70 is a protein tyrosine kinase with a role in T-cell receptor signal transduction. During T-cell activation, ZAP-70 binds to ITAM and becomes tyrosine phosphorylated. The binding of ZAP-70 to the phosphorylated ITAM is able to activate its kinase activity, <u>and relieves the inhibition of the transcription factor which regulates genes that are involved in the immune reaction</u>.

6 0
3 years ago
During DNA replication, which nucleotide will bind to an A nucleotide in the original or parental DNA strand?
Volgvan

Answer: nucleotide A will bind to nucleotide T during DNA replication.

Explanation:

In DNA replication, Adenine(A) pairs up with its complementary base Thymine(T). The DNA polymerase which is an enzyme ensures that the nucleotide with base T binds to the base A of parental nucleotide.

4 0
3 years ago
Other questions:
  • A drain cleaner consists of sodium hydroxide and aluminum. When the drain cleaner is added to water, bubbles of hydrogen are pro
    8·1 answer
  • Which of the following is NOT a type of air pollution?
    12·1 answer
  • The trapping of heat energy by the atmosphere and oceans maintains the Earth’s:
    5·1 answer
  • How does the change of ph effect homeostasis in animals ?
    12·1 answer
  • Harmful or helpful, is considered to be the source for new alleles and a main contributor to the diversity of life on earth
    10·1 answer
  • One essential factor for quality infant day care is: encouraging competition among infants. attention to health and safety. two
    9·1 answer
  • Please help this is due tomorrow.
    6·1 answer
  • Two people,both with AB blood have 4 children . What blood types should the children be
    5·2 answers
  • Explain how the terms in each set below are related.
    7·1 answer
  • Which process is represented by the arrow in the diagram below?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!