<span>A virus is made up of a core of genetic material, either DNA or RNA, surrounded by a protective coat called a capsid which is made up of protein. Sometimes the capsid is surrounded by an additional spikey coat called the envelope. Viruses are capable of latching onto host cells and getting inside them.</span>
Answer:
Nodes
Explanation:
A node is a stem zone where the leaves are attached, the stem portion between nodes are called internodes, the thricomes are like little hairs in the leave and the lenticels are spaces in the leave that helps to transpiration like the stomata.
So, the stem regions at which leaves are attached are called nodes.
Also the name nodes is really common in gardening, it helps a lot to identify which leave are they talking about.
I cannot found the exercise anywhere, so I will just explain how the toxin works.
A toxin is a toxic substance made by a living organism such as a bacterium, a fungus, a plant or an animal.
Labil toxins are toxins which are by easily degraded. among these toxins, there is the toxin of Escherichia coli and the cholera toxin of <span>Vibrio cholerea.
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The intracellular target of cholera toxin is adenylate cyclase, one of the most important eukaryotic cell regulatory systems. This enzyme is involved in the conversion of ATP into a cyclic AMP (cAMP), a crucial intracellular messenger in a wide variety of cellular processes.
Cholera toxin catalyzes the transfer of ADP-ribose from NAD (Nicotinamide Adenine Dinucleotide) to a specific arginine residue of the Gsa protein, resulting in the activation of adenylate cyclase and consequently the increase of the intracellular level cAMP. AMPc activates a cAMP-dependent protein kinase, which leads to phosphorylation of the protein, modification of ion transport and finally diarrhea.
Answer:
250ml
Explanation:
the mass of an object does not change even if the state of matter changes. but obivously if gas changes to a solid or liquid it would be heavier.
Answer:
The crab has just molted and the new exoskeleton has not yet hardened.
Explanation:
Crabs have an exoskeleton or shell which protects and supports them. From time to time crabs molt i.e. they discard the old exoskeleton and begin forming a new one. This process is a part of their normal growth. Soft-shell crabs had recently undergone molting and the new shell had just started to form. Hence, it has not hardened completely and is comparatively soft. Soft-shell crabs are in popular demand because it is easier to remove the soft shell and access the meat as compared to the normal crab.