Biology 1002B Lecture Notes - Lecture 4: Integral Membrane Protein, Peripheral Membrane Protein, Lipid Bilayer

19 views4 pages

sapphirebear815

19 Jan 2016

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Gsa 4 outcomes: meaning of hydrophilic, hydrophobic, fatty acid, saturated, membrane fluidity, desaturase, membrane permeability, transmembrane protein (integral membrane protein), peripheral protein, simple diffusion, facilitated diffusion. Plasma membrane: outer limit of the cytoplasm responsible for the regulation of substances moving into and out of cells. Phospholipids: a phosphate containing lipid: they are amphipathic: containing a region that is hydrophobic and one that is hydrophilic. Hydrophilic: water loving polar molecules - charged. Hydrophobic: water fearing non-polar molecules - uncharged. Phospholipid: 2 long chains of carbon and a hydrogen called a fatty acid. Fatty acid: single hydrocarbon chain with a carboxyl group linked at one end insoluble. Saturated fatty acids: fatty acids with only single bonds linking the carbon. Unsaturated fatty acids: prevented from packing closely together because of atoms linear the presence of double bonds. Desaturases: class of enzymes that introduce double bonds into fatty acids, altering their degree of saturation. Integral membrane protein: proteins imbedded in the phospholipid bi-layer.

Related Questions

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?

I have this questions for my homework i need help with them look please it is important i need help so please give me the correct answers for each question and also please be clear to understand and aslo be correct it is very important becuase i need them so i really need the right answers. please help me and on Questions 6 and 9 please help me with it hope you can help me with the correct answers please

Question 5

At a constant temperature, if you increase the number of unsaturated fatty acid chains in the phospholipid, the membrane will become......

less fluid

more fluid

fluidity will be unchanged

Question 6

Bacteria in a hot spring at 80 degrees celsius would be expected to have ______________ in their cell membrane

high proportions of saturated phospholipids

high proportions of unsaturated phospholipids

an equal ratio of saturated to unsaturated phospholipid

Question 7

Membrane proteins have an important role in membrane fluidity

True

False

Question 8

The HIV virus can't attach to cells that have a mutation in the CCR5 gene and so such individuals are resistant to HIV. What population of people have a higher incidence of the mutant CCR5 gene and why?

europeans because their ancestors survived the bubonic plague

North Americans because their ancestors survived small pox

europeans because they have a longer evolutionary past with HIV

Africans because they have a longer evolutionary past with HIV

Question 9

Nematode trapping fungi have ______________ molecules called ______________ that recognize specific carbohydrates on the surface of the nematode worms. This is how a fungus can recognize that its prey, the nematode worm, has wriggled into the loop. Write two words on lowercase separated by a space with no other syntax

Question 10

Diffusion requires energy

True

False

Question 11

The net direction of molecule movement when molecules diffuse is

down their concentration gradient

random directions

Question 12

In osmosis, water molecules from a solution of higher solute concentration cross a semi-permeable membrane into a solution of lower solute concentration?

True

False

Question 13

Which best defines osmosis?

In osmosis, water from a solution of lower solute concentration move across a semi-permeable membrane into a solution of higher solute concentration?

In osmosis, water from a solution of higher solute concentration move across a semi-permeable membrane into a solution of lower solute concentration?

Question 14

Animal cells placed into a hypotonic solution would most likely?

lyse (burst)

shrink

remain unchanged in size

Question 15

Glucose and amino acids move into cells via carrier proteins, the same protein can move glucose or amino acids

True

False

Question 16

ATP powered pumps move substances into and out of cells by diffusion?

True

False

Question 17

For every 3 Na ions moved out, 2 K ions are moved into a cell by one cycle of the sodium-potassium pump.

True

False

Question 18

Bulk transport of fluid and any of the substances within that fluid is called

pinocytosis

phagocytosis

receptor-mediated endocytosis

exocytosis

Question 5

At a constant temperature, if you increase the number of unsaturated fatty acid chains in the phospholipid, the membrane will become......

less fluid

more fluid

fluidity will be unchanged

Question 6

Bacteria in a hot spring at 80 degrees celsius would be expected to have ______________ in their cell membrane

high proportions of saturated phospholipids

high proportions of unsaturated phospholipids

an equal ratio of saturated to unsaturated phospholipid

Question 7

Membrane proteins have an important role in membrane fluidity

True

False

Question 8

europeans because their ancestors survived the bubonic plague

North Americans because their ancestors survived small pox

europeans because they have a longer evolutionary past with HIV

Africans because they have a longer evolutionary past with HIV

Question 9

Question 10

Diffusion requires energy

True

False

Question 11

The net direction of molecule movement when molecules diffuse is

down their concentration gradient

random directions

Question 12

In osmosis, water molecules from a solution of higher solute concentration cross a semi-permeable membrane into a solution of lower solute concentration?

True

False

Question 13

Which best defines osmosis?

In osmosis, water from a solution of lower solute concentration move across a semi-permeable membrane into a solution of higher solute concentration?

In osmosis, water from a solution of higher solute concentration move across a semi-permeable membrane into a solution of lower solute concentration?

Question 14

Animal cells placed into a hypotonic solution would most likely?

lyse (burst)

shrink

remain unchanged in size

Question 15

Glucose and amino acids move into cells via carrier proteins, the same protein can move glucose or amino acids

True

False

Question 16

ATP powered pumps move substances into and out of cells by diffusion?

True

False

Question 17

For every 3 Na ions moved out, 2 K ions are moved into a cell by one cycle of the sodium-potassium pump.

True

False

Question 18

Bulk transport of fluid and any of the substances within that fluid is called

pinocytosis

phagocytosis

receptor-mediated endocytosis

exocytosis

Biology 1002B Lecture Notes - Lecture 4: Integral Membrane Protein, Peripheral Membrane Protein, Lipid Bilayer

Document Summary

Get access

Related Documents

Biology 1002B Study Guide - Midterm Guide: Integral Membrane Protein, Peripheral Membrane Protein, Lipid Bilayer

Biology 1002B Lecture Notes - Lecture 5: Lipid Bilayer, Transmembrane Protein, Transporter 2

Biology 1002B Chapter Notes - Chapter chapter 2: Integral Membrane Protein, Peripheral Membrane Protein, Lipid Bilayer

Related Questions