Question

Riddle 1: (Hint: you want be to looking in aerobic respiration)

I am positively inclined to decline resulting in the turning of turbines, which churn out this monetary molecule.

Your answer to the riddle must explain what the following are referring to:

• positively
• inclined to decline
• turning of turbines
• monetary molecule

Riddle 2: (Hint: you want to be looking in membrane function, structure, and transport)

Like Gandalf The Grey, YOU SHALL NOT PASS! Unless you are completely neutral. If not neutral, you better have a friend guaranteeing you safe passage across this desiccated region!

Answer 1

Here is the meaning of Riddle 1:

I am positively inclined to decline - starting substance of cellular respiration is Glucose. So, Glucose align at active site of an enzyme in order to decline (breakdown). Positively means in order to generate ATP, a currency of energy.

resulting in the turning of turbines - this means the multistep processes of glucose breakdown finally generates NADH and FADH2 which enter oxidative phosphorylation and transfer electron to O2. Transfer of electron along electron transport chain lead to rotation of ATP synthase (turbine) to generate ATP.

which churn out this monetary molecule - monetary molecule is ATP here.

Here is the meaning of Riddle 2:

Like Gandalf The Grey, YOU SHALL NOT PASS! - Cell Membrane is selectively permeable i.e. it will allow certain molecule or ions pass through it. Therefore, membrane will not allow all molecule or ion to pass and enter cell.

Unless you are completely neutral - small neutral ions or molecules can easily pass through cell membrane.

If not neutral, you better have a friend guaranteeing you safe passage across this desiccated region! - If it is larger or charged, then special transport protein or carrier or pump move them across the membrane.