A primitive eukaryote was discovered that displayed a unique nucl...

Question

A primitive eukaryote was discovered that displayed a unique nucleic acid as its genetic material. Analysis provided the following information:

About 75 percent of the sugars are deoxyribose, while 25 percent are ribose. 
Postulate a model for the structure of this molecule that is consistent with the foregoing observations.

Accepted Answer

Hi, everyone. Let's take a look at this practice problem together as supported by the endo symbiotic theory. Primitive eukaryotic were believed to have the ability to engulf things such as pro carry outs through. So the ability to engulf things or take things into the cell. And so our options include a osmosis, osmosis is the movement of water across a cell membrane. And so a is going to be incorrect. Now, let's look at options. See, active diffusion, active diffusion is molecule movement and this requires energy thus active and it's moving molecules from an area of low concentration to high concentration. So moving those molecules against the concentration gradient. So c is incorrect. Now, let's take a look at exocet Asus and we're going to break this down. So exo means outside sido means cell insists equals process or action. So xo psychosis literally means the process of taking something outside of the cell. And this is actually the opposite of what we want. And so D is going to be wrong as well. So are correct. Option is gonna be be endo psychosis. And that's because if we break it down, endo equals internal, then you've got the sido equal cell and the cis equals process again. So it literally means the process of bringing something into the cell. So that's the ability to engulf things. So B is the correct answer. Alright, everyone, I hope you found this helpful and I'll see you soon for the next practice problem.

Key Concepts

Nucleic Acids

Deoxyribose vs. Ribose

Hybrid Nucleic Acid Structure

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