What is the most abundant lipid in cell membranes?: A molecule with hydrophilic and hydrophobic parts is called?

Phospholipids: Amphipathic

Triglycerides: Polar

Steroids: Nonpolar

Waxes: Ionic

[A] A


What is the most abundant lipid in cell membranes?: Which part of a phospholipid is hydrophobic?

Phospholipids: Fatty acid tails

Triglycerides: Phosphate head

Steroids: Glycerol

Waxes: Sugar


What is the most abundant lipid in cell membranes?: Which part of a phospholipid is hydrophilic?

Phospholipids: Phosphate head

Triglycerides: Fatty acid tails

Steroids: Steroid ring

Waxes: Hydrocarbon chain


What is the most abundant lipid in cell membranes?: Why do phospholipids form bilayers in water?

Phospholipids: Hydrophobic interactions

Triglycerides: Covalent bonds

Steroids: Ionic bonds

Waxes: Peptide bonds


What is the most abundant lipid in cell membranes?: Membranes are mainly held together by?

Waxes: Hydrogen bonds


What is the most abundant lipid in cell membranes?: Why is phospholipid flip-flop rare?

Phospholipids: Hydrophilic head crosses hydrophobic core

Triglycerides: Needs ATP

Steroids: Too small

Waxes: Proteins block it


What is the most abundant lipid in cell membranes?: Which moves faster in membranes?

Phospholipids: Lipids

Triglycerides: Proteins

Steroids: Carbohydrates

Waxes: Nucleic acids


What is the most abundant lipid in cell membranes?: Proteins move slower than lipids because they are?

Phospholipids: Larger

Triglycerides: Charged

Steroids: Hydrophobic

Waxes: Polar


What is the most abundant lipid in cell membranes?: Unsaturated fatty acids have?

Phospholipids: Kinked tails

Triglycerides: Straight tails

Steroids: No double bonds

Waxes: Short chains


What is the most abundant lipid in cell membranes?: What increases membrane fluidity?

Phospholipids: Unsaturated fats

Triglycerides: Saturated fats

Steroids: Low temperature

Waxes: High protein


What is the most abundant lipid in cell membranes?: Why do unsaturated fats increase fluidity?

Phospholipids: Cannot pack tightly

Triglycerides: Longer tails

Steroids: More cholesterol

Waxes: More proteins


What is the most abundant lipid in cell membranes?: At low temperatures membranes become?

Phospholipids: Solid

Triglycerides: More fluid

Steroids: More permeable

Waxes: Active


What is the most abundant lipid in cell membranes?: Cholesterol at high temperatures?

Phospholipids: Restricts phospholipid movement

Triglycerides: Increases fluidity

Steroids: Removes proteins

Waxes: Destroys membrane


What is the most abundant lipid in cell membranes?: Plant membranes mainly contain?

Phospholipids: Steroids

Triglycerides: Cholesterol

Steroids: Waxes

Waxes: Triglycerides


What is the most abundant lipid in cell membranes?: Membrane fluidity affects?

Phospholipids: Protein movement

Triglycerides: DNA replication

Steroids: Cell division

Waxes: Ribosomes


What is the most abundant lipid in cell membranes?: Too much membrane fluidity causes?

Phospholipids: Loss of protein function

Triglycerides: Better transport

Steroids: More ATP

Waxes: Cell growth


What is the most abundant lipid in cell membranes?: Fish in cold water have membranes rich in?

Steroids: Proteins

Waxes: Cholesterol


What is the most abundant lipid in cell membranes?: Bacteria in hot springs have?

Phospholipids: Unusual lipids

Triglycerides: No membranes

Steroids: Thin membranes

Waxes: More sugars


What is the most abundant lipid in cell membranes?: Main function of transport proteins?

Phospholipids: Move substances

Triglycerides: Make ATP

Steroids: Store energy

Waxes: DNA synthesis


What is the most abundant lipid in cell membranes?: Which is NOT a membrane protein function?

Phospholipids: Protein synthesis

Triglycerides: Transport

Steroids: Signal transduction

Waxes: Cell recognition


What is the most abundant lipid in cell membranes?: Signal transduction means?

Phospholipids: Message sent into cell

Triglycerides: Energy storage

Waxes: Diffusion


What is the most abundant lipid in cell membranes?: Cell-cell recognition uses?

Phospholipids: Carbohydrates

Triglycerides: Lipids

Steroids: DNA

Waxes: ATP


What is the most abundant lipid in cell membranes?: Intercellular joining helps cells?

Phospholipids: Stick together

Triglycerides: Move faster

Steroids: Divide

Waxes: Respire


What is the most abundant lipid in cell membranes?: Attachment to cytoskeleton helps?

Phospholipids: Maintain cell shape

Triglycerides: Protein folding

Steroids: ATP synthesis

Waxes: DNA replication


What is the most abundant lipid in cell membranes?: Glycoproteins are?

Phospholipids: Protein plus carbohydrate

Triglycerides: Protein plus lipid

Steroids: Lipid plus sugar

Waxes: DNA plus protein


What is the most abundant lipid in cell membranes?: Glycolipids are?

Phospholipids: Lipid plus carbohydrate

Triglycerides: Protein only

Steroids: Carbohydrate only

Waxes: DNA


What is the most abundant lipid in cell membranes?: Glyco means?

Phospholipids: Carbohydrate

Triglycerides: Protein

Steroids: Fat

Waxes: Energy


What is the most abundant lipid in cell membranes?: Membrane carbohydrates act as?

Phospholipids: Cell identity markers

Triglycerides: Enzymes

Steroids: Pumps

Waxes: Channels


What is the most abundant lipid in cell membranes?: Selective permeability means?

Phospholipids: Some substances pass easily

Triglycerides: Everything passes

Steroids: Nothing passes

Waxes: Only water passes


What is the most abundant lipid in cell membranes?: Nonpolar molecules cross membranes easily because they are?

Phospholipids: Hydrophobic

Triglycerides: Charged

Steroids: Large

Waxes: Polar


What is the most abundant lipid in cell membranes?: Which crosses membrane most easily?

Phospholipids: Oxygen

Triglycerides: Glucose

Steroids: Ions

Waxes: Proteins


What is the most abundant lipid in cell membranes?: Polar molecules cross membranes?

Phospholipids: Slowly

Triglycerides: Very easily

Steroids: Never

Waxes: Only with ATP


What is the most abundant lipid in cell membranes?: Charged ions cross membranes using?

Phospholipids: Transport proteins

Triglycerides: Diffusion

Steroids: Osmosis

Waxes: Lipids


What is the most abundant lipid in cell membranes?: Lipid bilayer is?

Phospholipids: Semi-permeable

Triglycerides: Fully permeable

Steroids: Rigid

Waxes: Protein only


What is the most abundant lipid in cell membranes?: Transport proteins mainly help move?

Phospholipids: Hydrophilic substances

Triglycerides: Hydrophobic substances


What is the most abundant lipid in cell membranes?: Channel proteins provide?

Phospholipids: Corridors

Triglycerides: Energy

Steroids: ATP

Waxes: Enzymes


What is the most abundant lipid in cell membranes?: Aquaporins transport?

Phospholipids: Water


What is the most abundant lipid in cell membranes?: Aquaporins allow passage of?

Phospholipids: Water only

Triglycerides: All molecules


What is the most abundant lipid in cell membranes?: Carrier proteins work by?

Phospholipids: Changing shape

Triglycerides: Forming pores

Steroids: Breaking membrane

Waxes: Using DNA


What is the most abundant lipid in cell membranes?: Transport proteins are?

Phospholipids: Specific to passengers

Triglycerides: Random

Steroids: Non-specific

Waxes: Always active


What is the most abundant lipid in cell membranes?: Diffusion results from?

Phospholipids: Thermal motion

Triglycerides: ATP use

Steroids: Protein pumps

Waxes: Active transport


What is the most abundant lipid in cell membranes?: Molecule movement in diffusion is?

Phospholipids: Random

Triglycerides: Directional

Steroids: Upward

Waxes: Against gradient


What is the most abundant lipid in cell membranes?: Net diffusion moves from?

Phospholipids: High to low concentration

Triglycerides: Low to high

Steroids: Equal concentrations

Waxes: Inside to outside


What is the most abundant lipid in cell membranes?: Diffusion requires energy?

Phospholipids: No

Triglycerides: Yes

Steroids: Only ATP

Waxes: Sometimes


What is the most abundant lipid in cell membranes?: Passive transport is?

Phospholipids: Diffusion across membrane

Triglycerides: Against gradient

Steroids: With ATP

Waxes: Protein synthesis


What is the most abundant lipid in cell membranes?: Osmosis is diffusion of?

Triglycerides: Ions

Steroids: Proteins

Waxes: Solutes


What is the most abundant lipid in cell membranes?: Tonicity describes?

Phospholipids: Ability to gain or lose water

Triglycerides: ATP level

Steroids: Protein activity

Waxes: Membrane strength


What is the most abundant lipid in cell membranes?: Isotonic solution causes cell to?

Phospholipids: Stay same size

Triglycerides: Burst

Steroids: Shrink

Waxes: Divide


What is the most abundant lipid in cell membranes?: Hypertonic solution causes cell to?

Phospholipids: Shrink

Steroids: Stay same


What is the most abundant lipid in cell membranes?: Cells without rigid wall in hypertonic solution?

Steroids: Divide

Waxes: Die instantly


What is the most abundant lipid in cell membranes?: Facilitated diffusion uses?

Triglycerides: ATP

Steroids: DNA


What is the most abundant lipid in cell membranes?: Channel proteins allow movement of?

Phospholipids: Specific ions or molecules

Steroids: Proteins only

Waxes: Water only


What is the most abundant lipid in cell membranes?: Kidneys need aquaporins to?

Phospholipids: Prevent dehydration

Triglycerides: Make ATP

Steroids: Produce glucose

Waxes: Filter proteins


What is the most abundant lipid in cell membranes?: Ion channels transport?

Phospholipids: Ions

Triglycerides: Proteins

Steroids: Water

Waxes: Glucose


What is the most abundant lipid in cell membranes?: Carrier proteins differ from channels because they?

Phospholipids: Change shape

Triglycerides: Form pores

Steroids: Are lipids

Waxes: Use DNA


What is the most abundant lipid in cell membranes?: Active transport moves substances?

Phospholipids: Against concentration gradient

Triglycerides: Down gradient

Steroids: Randomly

Waxes: Without proteins


What is the most abundant lipid in cell membranes?: Active transport requires?

Phospholipids: ATP

Triglycerides: Diffusion

Steroids: Osmosis

Waxes: No energy


What is the most abundant lipid in cell membranes?: Electrogenic pumps create?

Phospholipids: Membrane potential

Steroids: Water flow

Waxes: pH change


What is the most abundant lipid in cell membranes?: Main electrogenic pump in plants is?

Phospholipids: Proton pump

Triglycerides: Sodium pump

Steroids: Calcium pump

Waxes: Water pump


What is the most abundant lipid in cell membranes?: Cotransport uses?

Phospholipids: Gradient of one substance

Triglycerides: ATP only

Steroids: Diffusion only

Waxes: No proteins


What is the most abundant lipid in cell membranes?: Bulk transport moves?

Phospholipids: Large molecules

Triglycerides: Ions only

Steroids: Small molecules

Waxes: DNA only


What is the most abundant lipid in cell membranes?: Exocytosis is?

Phospholipids: Vesicles fusing with membrane

Triglycerides: Cell eating

Steroids: Cell drinking

Waxes: Diffusion


What is the most abundant lipid in cell membranes?: Endocytosis is?

Phospholipids: Vesicle formation inward

Triglycerides: Secretion

Steroids: Diffusion

Waxes: Active transport


What is the most abundant lipid in cell membranes?: Phagocytosis involves?

Phospholipids: Engulfing large particles

Triglycerides: Liquids only

Steroids: Small ions


What is the most abundant lipid in cell membranes?: Pinocytosis involves?

Phospholipids: Extracellular fluid uptake

Triglycerides: Large particles

Steroids: Cell eating

Waxes: DNA


What is the most abundant lipid in cell membranes?: Receptor-mediated endocytosis is?

Phospholipids: Specific ligand uptake

Triglycerides: Non-specific

Waxes: Osmosis


What is the most abundant lipid in cell membranes?: Endocytosis and exocytosis help?

Phospholipids: Remodel membrane

Triglycerides: Destroy membrane

Steroids: Stop transport

Waxes: Remove proteins


What is the most abundant lipid in cell membranes?: Fluid mosaic model describes membranes as?

Phospholipids: Fluid with proteins

Triglycerides: Rigid

Steroids: Static

Waxes: Lipid only


What is the most abundant lipid in cell membranes?: Selective permeability is due to?

Phospholipids: Lipid bilayer structure

Triglycerides: Proteins only

Steroids: Carbohydrates