Mario and several friends spend a day at the beach. While watching the ocean waves crashing to shore, Mario wonders how much of the world's water is contained in different types of bodies of water such as oceans, lakes, and rivers. He decides to research the percentage of Earth's water found in different locations. Which does his research reveal? Multiple choice question. A) Less than 3 percent of Earth's water is freshwater containing no salt. B) The ice caps located at both poles contain 30 percent of Earth's water. C) Fifty percent of Earth's water is in oceans and the glaciers at the poles. D) Ninety percent of Earth's water is in lakes, rivers, and groundwater.

A

Explanation:

The correct answer here would be that less than 3 percent of Earth's water is freshwater containing no salt.

Generally speaking, about 71 % of the earth is made up of water. Out of this percentage, approximately 97 % is found in the oceans with less than 3 % being freshwater. About 68.7 % of the freshwater is locked-up as glacier and ice, 30.1 % is groundwater, while the remaining 1.2 % represents surface and other forms of freshwaters which include ground ice and permafrost, lakes, atmosphere, rivers, swamps and marshes, soil moisture, and the freshwater in living organisms.

The correct option is A.

Glycogen

Explanation:

This is based on the fact that the response to hormones generates a signaling cascade that eventuates in the activation or inhibition of enzymes involved in glycogen metabolismThe benefit of a multi-step cascade is that it amplifies the signal which means that response can be fast and significantHigh level of secondary messenger, cyclic adenosine monophosphate (cAMP)  activates a protein called protein kinase A (pKA) which phosphorylates phosphorylase kinase (pK) and activates itOn the other hand at the same time pKA phosphorylates glycogen synthase and inactivate itpK becomes active that phosphorylates glycogen phosphorylase and makes it active, glycogen phosphorylase catalyse breakdown of glycogen (in liver and muscle cells) Activated protein kinase A enters in nucleus and phosphorylate a transcriptional activator called cyclic AMP response element binding protein (CREB) Phosphorylated CREB becomes active and binds to a DNA element called cyclic AMP response element (CRE) and induce transcription of various genes which involved in glucose metabolism