First cell theory
All living things are composed of cells
Second cell theory
Cells are the basic unit of structure and function in living things
Third cell theory
All cells are produced from other cells
Therefore, I believe the correct answer would be choice A.
I hope this helps you and have a great day!! :)
To convert to scientific notation, you must move the decimal to make the number greater then 1 and less then 10.
So you take your decimal and move it.
0.001
. -->
We move the decimal to before the 1 which gives us the whole number of 1.
Now we get:
1*10
(always *10)
and now you want to make this exponent how many times you moved the decimal, in this case 3.
This time its negative since we moved it to the right, moving to the left would make it positive.
Final answer:
Answer: 1. Phosphatidyl serine: the phosphoserine group
2.Sphingomyelin: the phosphocholine group
3.Cholesterol: the hydroxyl group
4. Triacylglycerol: the ester bond between glycerol and fatty acids.
Explanation:
Amphipathic molecules have parts that are hydrophobic and hydrophilic. The cell membrane is made up of amphipathic molecules.
Phosphatidyl serine has a polar (hydrophilic) head named the phosphoserine group, the fatty acid group forms the chain.
Sphingomyelin consist of phosphicholine and ceramide. The phosphocholine group is the hydrophilic part while the ceramide is the hydrophobic part.
Cholesterol contains a hydroxyl group (-OH) that is polar while the rest part of the cholesterol is non polar.
Triacylglycerol is made up of glycerol and 3 fatty acid chains. The ester bonds between glycerol and the fatty acids is the Polar part of triacylglycerol.
Answer:
sugar-phosphate forms the structural framework of nucleic acids, including DNA and RNA
Explanation:
A sugar-phosphate backbone joins together nucleotides in a DNA sequence. The sugar-phosphate backbone forms the structural framework of nucleic acids, including DNA and RNA. This backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.