00:01
Hi there.
00:02
In this question, we actually have several related questions, somewhat related.
00:08
They're all biology anyway.
00:10
So i don't want to spend too much time on any one question.
00:12
Otherwise, that would make this incredibly long.
00:15
So let's get started here with number four.
00:18
Which biological molecules are not polymers? well, we know proteins are polymers of amino acids.
00:27
Steroids are lipids.
00:28
They belong to the lipid family.
00:30
And steroids are not polymers.
00:34
Polysaccharides, choice c, those are polymers of sugar molecules, and nucleic acids are polymers of nucleotides.
00:43
So the answer here is steroids.
00:46
For the first question, moving on to number 10, which is the following is the region between the nucleus and the cell membrane.
01:00
So we have the nucleus of a eukaryotic cell, and we have the cell membrane.
01:09
The nucleus is, of course, where the dna is located.
01:16
So we are interested in the region between the nucleus and the cell membrane.
01:24
In other words, the area i just shaded in blue.
01:27
And that is going to be where we find the cytoplasm.
01:35
It's not going to be the cell membrane.
01:37
It's not going to be the nucleus because we're looking for things between those two.
01:41
And it's not going to be dna since dna is located in the nucleus.
01:48
Okay, let's look at number 18, a disaccharide means a sugar molecule composed of two monosaccharides bonded together...