Macromolecules: Lipids, Carbohydrates, Nucleic Acid, Excerpt 1 Instructor: Hazel Sive View the complete course: ocw.mit.edu/7-01SCF11 License: Creative Commons BY-NC-SA More information at ocw.mit.edu/terms More courses at ocw.mit.edu
@ 1:07 condensation reactions can also be called dehydration synthesis, because you are a) removing water, and b) synthesizing something (macromolecules). haha i was confused by the condensation, but i hope this helps some of you who have never learned the term, like me.
This is MUCH easier to understand. The college I go to gives us reading and lectures us in a way that makes these so drawn out and complicated, filling your head with useless dry information and you’re unable to absorb the main points. Maybe it’s just me, but I appreciate this lecture. Thank you
This is very very basic class, but very important!! @8:00 Condensation interaction between Glycerol and Fatty Acid rise up the Triglyceride + H2O*3 in Lipids parts.
Introns and exons: I actually don' find this nomenclature confusing as I think of Exons as part of the mRNA leaving (exiting) the nucleus. So with that perspective it makes sense that introns are intervening and Exons are the mRNA parts that exits into the cytosol.
so does that mean that cell membranes are not made up of one single type of phospholipid, i.e. homogeneous, but can be a mixture of many different phospholipids?
This is college level course from the Massachusetts Institute of Technology. For more information, see the course on MIT OpenCourseWare at: ocw.mit.edu/7-01SCF11. Best wishes on your studies!
You’re right, phosphate is 3-. She skipped a step and wrote it as it’s bonded to the glycerol backbone: when bound in the phosphoanhydride bond to glycerol, the polar head group charge (phosphate) is 2-.
No, transfats are never saturated fats because in order to be trans, a double bond is required. Saturated fats are well, saturated. There are no double bonds.
Saturated fats are rotatable, which means that some times they are trans and some times they are cis. Trans fats are bad for you.Hence,saturated fats are also bad. Not a biology professor! but just wondering if i am right ?
I believe trans fats cannot be saturated. No matter how you rotate a saturated molecule, you can never say that both the hydrogens are on the same side/plane as there are 2 on each side and it's symmetrical. However, the reason why cis-trans isomers exist is because of the restricted rotation. If it could rotate then they would be interchangeable, but cis-trans structures are rigid, not interchangeable. Thats why I believe what you've said is wrong... but I'm a student as well so...idk
You think that a biology professor from MIT would be up to date with what fats are good and what fats are bad for you. SMH. Saturated fats are not "bad" fats as she says. They play vital and essential roles within our bodies and promote optimal health. Trans fats are the "bad" fats that should never be consumed as they are detrimental to the human body. Different sources of saturated fats are healthier for you than others, but labeling all saturated fats as "bad" is a wrong and misleading.
*Louis Raskin* World Health Organization (WHO) and Food and Agriculture Organization (FAO) expert consultation report concluded that "intake of saturated fatty acids is directly related to cardiovascular risk. The traditional target is to restrict the intake of saturated fatty acids to less than 10% of daily energy intake and less than 7% for high-risk groups. If populations are consuming less than 10%, they should not increase that level of intake Source :- Wikipedia
