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
Nutka1998 [239]
3 years ago
8

Are bacterias eukaryotic or procaryotic?

Biology
1 answer:
Oliga [24]3 years ago
5 0

Answer:

Prokaryotic

Explanation:

they are unicellular :)

You might be interested in
Gunther touched a hot object and received a minor burn. How did the skeletal system help prevent further damage?
Umnica [9.8K]
Hello to answer your question correctly.

The skeletal system helped him move his hand away from the hot object. Because the skeletal system reacted by sending a message to the brain saying that was hot and dangerous thus causing the movement of the hand.


              Signed by, Virtouso Sargedog 

3 0
3 years ago
Read 2 more answers
About 12 to 24 hours after the last meal, a person's blood sugar level normally varies from 60 to 90 mg per 100 ml of blood, alt
VMariaS [17]

Answer:

Homeostasis.

Explanation:

The insulin and glucagon hormone are important for the maintenance of the blood sugar level in the body. The glucagon increase the blood sugar level whereas insulin decreases the blood sugar level.

The homeostasis may be defined as the process of the maintenance of the normal physiological conditions of the body irrespective of the change in the external and internal environment. The change in the blood sugar level can be maintained by the insulin and glucagon hormone and is important for the homeostasis maintenance.

Thus, the answer is homeostasis.

8 0
3 years ago
Can someone please help me with this ASAP thank you!
Serggg [28]

E. systematic aorta

D. left ventricle

C. left atrium

A. pulmonary artery

B. superior venacava (i’m not sure if this one is right)

7 0
3 years ago
Which statement correctly answers whether the question of alien life on this moon is scientific?
Jet001 [13]

Answer:

I think there is no life in tbe universe accept the earth.

Explanation:

6 0
3 years ago
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
Other questions:
  • List and give a function for the three main areas of the brain
    10·1 answer
  • A life-form that evolved during the _____ Era was the dinosaur.
    13·1 answer
  • Consider the following planned experiment​
    8·2 answers
  • How are atoms in molecules being rearranged into different molecules
    15·1 answer
  • An amphibian heart is shown in the diagram.
    15·2 answers
  • The cell cycle involves the growth, replication, and division of a eukaryotic cell. Mitosis most directly plays a role in
    7·2 answers
  • Gene genealogies can vary for different loci. What does this imply for species trees? Group of answer choices
    9·1 answer
  • Write in your own words | 50 points | will mark brainliest
    6·1 answer
  • This diagram shows a chemical reaction in which two glucose molecules combine to form a molecule of maltose.
    10·1 answer
  • What is the appropriate name for the blood vessel leading into the glomerulus of the nephron?.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!