BIOL 300 Lecture Notes - Lecture 3: Cyclopentane, Triglyceride, Sebaceous Gland

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beigewhale811

22 May 2020

School

American River College

Department

Biology

Course

BIOL 300

Professor

Ramones

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Document Summary

Recognize the properties that define lipids and describe the general structures of fats, phospholipids, and steroids. Lipids are a group of organic molecules that share solubility properties. Only molecules of life that are not defined by their structure! Lipids are mostly c h (nonpolar) so they are hydrophobic but they are soluble in certain organic solvents that are nonpolar or weakly polar. Fats: (triglyceride) lipids composed of glycerol bonded to 3 fatty acids. They bond through dehydration reactions: it takes 3 water molecules to form a triglyceride and 3 to break it down. Phospholipids: lipids composed of glycerol bonded to 2 fatty acids and a phosphate group (negatively charged) plus a polar or charged group. Head region (polar/charged group + phosphate + glycerol) is hydrophilic and tail region (fatty acids) is hydrophobic. Steroids: lipids composed of 4 carbon rings bonded to groups that vary by steroid (all pics on ppt have 3 cyclohexanes and 1 cyclopentane)

Related Questions

1. What is an organic molecule?

2.Name three hydrocarbons and be able to draw their structural formulas.

3. What is an isomer? List and describe the three types (structural, geometric, and enantiomers).

4. Be able to recognize and describe the properties of these functional groups: aldehyde, ketone, hydroxyl, sulfhydryl, carboxyl, amino, and phosphate groups.

5. What is a monosaccharide? Give two examples of these molecules and their functions.

6. Describe these chemical reactions: dehydration synthesis (condensation reaction) and hydrolysis (rehydration).

7. What is a disaccharide? List two and give their functions.

8. What is a polysaccharide? List two storage forms and two structural forms. How are they formed and what is their specific function?

9. How do the pancreatic hormones insulin and glucagon regulate blood sugar levels?

10. What is molting and why is it necessary in certain animals?

11. What four molecules are bonded together to form a triglyceride or fat? Why are fats nonpolar? What are some functions of fats as well as other lipids such as oils and waxes?

12. How do saturated and unsaturated fats differ? Discuss bonding patterns and possible sources of these fats. Which type is healthier for you? Why?

13. Why do animals store most of their excess glucose as fats or oils rather than as glycogen or protein? Give two reasons.

14. What are phospholipids? Identify parts of the phospholipid bilayer that are hydrophobic or hydrophilic? What important cell structure do these molecules help create?

15. Describe the structure of a steroid. How is cholesterol used in beneficial ways in your body?

16. What are LDLs and HDLs? Which is considered good or bad cholesterol? What condition could result from high blood pressure?

17. What are four ways to either reduce high blood cholesterol or maintain a safe level?

18. What is the composition of an amino acid? Why would they be considered nonpolar, polar, acidic, or basic?

19. Define dipeptides and polypeptides.

20. Describe the primary structure of a protein. What type of bonding creates it?

21. What is the secondary structure of a protein? Name two types of secondary structure and indicate what type of bonding holds them together. List three fibrous proteins.

22. What is the tertiary structure of a protein? What types of bonds or chemical interactions allow a protein to maintain this structure? List three globular proteins.

23. What is the quaternary structure of a protein? Describe a hemoglobin molecule.

24. What are the subunits of nucleic acids and what is their composition? How are these subunits bonded together? What is DNS's basic shape?

25. List three differences between DNA and RNA.

Unit 2 Organic Chemistry

Organic compounds vs. Inorganic compounds

What makes a compound organic? Inorganic?

Functional groups (phosphate groups, amino groups, carboxyl groups)

Know the structure of each of these groups, and which organic compounds they are found in. You can draw them for your own use.

Hydrolysis

What is it? What is it used for?

Dehydration synthesis

What is it? What is it used for?

Carbohydrates (Monosaccharides, Disaccharides, Polysaccharides and examples)

Know the process of joining two monosaccharides together to create a disaccharide.

Be able to give examples of several monosaccharides, disaccharides and polysaccharides.

Monosaccharide examples (3)	Disaccharide examples (2)	Complex carbohydrates (3)

Lipids (Saturated vs. Unsaturated; Phospholipids, Steroids)

Define a saturated fatty acid.

Define an unsaturated fatty acid. Draw if it helps.

What process is used to put the fatty acid chain on a glycerol molecule?

Hydrophilic vs. hydrophobic

Define hydrophilic.

What part of the phospholipid is hydrophilic?

Define hydrophobic.

What part of the phospholipid is hydrophobic?

Proteins, types and functions

What is a protein composed of, and what does it do?

Amino acids

Name the three parts of the amino acid that come off the common Carbon.

Identify each of the three parts. (Amino Acid ID game)

Peptide Bonds

How are they formed?

What two parts of each amino acid do they join together?

Enzymes - define.

Levels of Protein structure

Complete the chart below.

Protein structure level	definition
Primary
Secondary
Tertiary
Quarternary

Protein Denaturation

What is it and how does it happen?

Define what a Solute is.

Define what a solvent is

Nucleic acids (DNA, RNA, ATP)

Nucleotide

Name its three parts and be able to identify each of them on a diagram. (Nucleotide ID game)

What are the two possible sugars used in a nucleotide?

Complete the Table below.

	DNA	RNA	ATP
What sugar does it have?
What nitrogen bases does it have?
Provide the pairings of the nitrogen bases of each nucleic acid			N/A
What is its structure?

Question 401 pts

Kinetic energy is the stored energy that can be used for motion.

True

False

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Question 411 pts

When an electron is transferred from one atom to another, and the two atoms are then electrically attracted to one another, a(n) ________________ bond is formed.

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Question 421 pts

Changing the number of ____________ of an atom would change the chemical properties of the atom.

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Question 431 pts

Forming molecules and breaking down molecules in biological organisms usually requires the use of _________ to help the reaction proceed faster.

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Question 441 pts

Organic molecules have a core composed of .

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Question 451 pts

The building blocks of carbohydrates are

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Question 461 pts

Water molecules crossing a membrane from high to low concentration is .

active transport

cell fate

facilitated diffusion

osmosis

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Question 471 pts

Choose the membrane molecule responsible for the passage of polar molecules and ions into and out of the cell.

phospholipids

transmembrane channel proteins

cell surface proteins

carbohydrate chains

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Question 481 pts

The simplest cells are .

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Question 491 pts

Which of the following membrane bound organelles are found inside bacterial cells:

nucleus

organelles are not found in prokaryotic cells

mitochondria

chloroplasts

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Question 501 pts

Which of the following is a specialized components of the cell, is associated with the rough endoplasmic reticulum, and is responsible for making proteins.

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Question 511 pts

Proteins are sorted, modified, and packaged by the _____________ and later transported to the outside of the cell.

ribosomes

golgi bodies (golgi apparatus)

nucleus

mitochondria

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Question 521 pts

Dehydration synthesis is a process of linking two smaller subunits together to form a polymer. Which of the following statements below is true of dehydration synthesis?

Oxygen is consumed.

A water molecule is removed from the molecules.

A water molecule is added to the molecules

Carbon dioxide is given off.

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Question 531 pts

Proteins are made up of _________ held together by peptide bonds.

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Question 541 pts

Which of the following gives an amino acid its properties?

NH2

R Group or functional group

COOH

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Question 551 pts

The final three-dimensional shape of a protein that includes the bonding of two or more polypeptide chains is call its _____ structure.

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Question 561 pts

How do DNA and RNA differ?

all statements are differences between DNA and RNA.

DNA is double stranded while RNA is single stranded.

They have different sugars.

Thymine is present in DNA but not in RNA.

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Question 571 pts

Which of the following is a component of a DNA nucleotide?

phosphate

a nitrogen containing base

All are components of a nucleotide.

5-carbon sugar

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Question 581 pts

Cell membranes are made up of several different types of molecules. Select the membrane molecule below that is made up of a polar region and two non-polar fatty acid tails.

transmembrane proteins

carbohydrate chains

phospholipids

cell surface proteins

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Question 591 pts

Two organelles which are believed to have once been free-living bacterial cells are ____________ and ______________.

chloroplasts and mitochondria

golgi apparatus and endoplasmic reticulum

ribosomes and nucleolus

peroxisomes and lysosomes

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