Stats: Biology topic 1

General Stats

This quiz has been taken 39 times
The average score is 7 of 101

Answer Stats

Hint	Answer	% Correct
what are the four types of biological molecules	carbohydrates	77%
	lipids	77%
	proteins	74%
what is a smaller unit that combines to make a polymer	monomer	54%
a large molecule made up of many repeating units of monomers joined together by chemical bonds	polymer	54%
	nucleic acids	51%
which molecule is made up of carbon, hydrogen, oxygen, nitrogen	proteins	43%
which molecule is made up of carbon, hydrogen, oxygen,	lipids	40%
which molecule contains nitrogen and phosphorus	nucleic acids	31%
name an example of a monosaccharide	glucose/fructose/galactose	23%
A reaction where a water molecule is added to break a chemical bond between two molecules	hydrolysis	20%
how many carbon atoms does a pentose sugar have	5	17%
what type of reaction synthesises most polymers	condensation	17%
what type of reaction breaks down most polymers	hydrolysis	17%
A reaction where monomers join together and release a water molecule	condensation	14%
what is the process by which monomers join up to form a polymer	polymerisation	14%
Which carbohydrates can be used to make nucleic acids	deoxyribose/ribose	11%
what forms the structural component of plant cell walls	cellulose	9%
	disaccharides	9%
What is the primary energy source in animals and plants	glucose	9%
name an example of a disaccharide	maltose/sucrose/lactose	9%
what are the three types of carbohydrate	monosaccharides	9%
	polysaccharides	9%
what is sucrose made up of	glucose and fructose	6%
what stores excess glucose and releases it to supply energy when needed (animals)	glycogen	6%
what are are complex carbohydrates made up of many monosaccharides joined via glycosidic bonds	polysaccharides	6%
name an example of a polysaccharide	starch/glycogen/cellulose	6%
Which test can identify proteins	biuret	3%
what is a positive result for starch test	blue black colour	3%
what consists of highly branched chains of alpha-glucose monomers joined by glycosidic bonds	glycogen	3%
what help cells identify each other and communicate	glycoproteins	3%
How can you test for starch	iodine solution	3%
what stores excess glucose and releases it to supply energy when needed (plants)	starch	3%
what is the main function of polysaccharides	storage	3%
in which solutions do H+ ions break ionic or hydrogen bonds and denature the enzymes	acidic	0%
in which solutions do OH- ions break ionic or hydrogen bonds and denature the enzymes	alkaline	0%
what are the names of the two glucose isomers	alpha glucose	0%
What are the two possible shapes formed by a protein's secondary structure	alpha helix	0%
How can you test for reducing sugars	Benedict's Reagent and water bath	0%
	beta glucose	0%
	beta pleated sheet	0%
	bonds store a lot of energy	0%
Describe the structure of a fatty acid	carboxyl group attached to a hydrocarbon chain	0%
what is the general formula for monosaccharides	(CH2O)n	0%
how to determine reducing sugar concentration	colorimeter	0%
which inhibitors decrease the rate of reaction by preventing the formation of enzyme-substrate complexes	competitive	0%
what are molecules that bind to the active site of the enzyme	competitive inhibitors	0%
	contain carbon hydrogen and oxygen	0%
What are the similarities between triglycerides and phospholipids	contain glycerol, fatty acids and ester bond	0%
what do you call two amino acids joined by a peptide bond	dipeptide	0%
	disulphide bridges	0%
what is the role of lipids	energy supply/structural components/waterproofing/insulation/protection	0%
What are the roles of proteins	enzymes and antibodies/transport and structural components/hormones and muscle contraction	0%
what is it when a substrate(s) binds to an enzyme	enzyme substrate complex	0%
How can you test for lipids	ethanol shake distilled water	0%
What are most lipids made up of	fatty acids combined with an alcohol	0%
what do irreversible inhibitors do	form strong bonds with the enzyme	0%
what do reversible inhibitors do	form weak bonds with the enzyme	0%
What is the structure of a triglyceride	glycerol attached to 3 fatty acid tails	0%
What are the components of a phospholipid	glycerol, phosphate, 2 fatty acid tails	0%
Name a factor that can cause an enzyme to denature	high temperature/extreme ph	0%
What holds the tertiary structure of a protein together	hydrogen and ionic bonds	0%
What type of bonds are involved in the secondary structure of a protein	hydrogen bonds	0%
	hydrophobic and hydrophilic interactions	0%
What are the weak interactions between polar and non-polar R groups called	hydrophobic and hydrophilic interactions	0%
what increases the rate of reaction until eventually the rate of reaction plateaus	increasing substrate or enzyme concentration	0%
which model proposes that the enzyme's active site changes shape when the substrate(s) bind, putting a strain on the substrate's bonds and lowering the activation energy	induced fit	0%
what are molecules that bind to enzymes to reduce their activity	inhibitors	0%
What are the characteristics of glycogen that make it good as an energy store	insoluble and compact/large/more branched than starch	0%
	insoluble in water	0%
which enzymes act within the cells that produce them	intracellular enzymes	0%
Which type of chemical bond forms between positive and negative R groups	ionic	0%
What are the characteristics of starch that make it a good energy store	large and insoluble/highly branched/coiled	0%
which model suggests that enzymes have a specific active site that perfectly fits the substrate(s)	lock and key	0%
How do enzymes speed up reactions	lower the activation energy	0%
What does an orange colour indicate in the reducing sugar test	medium concentration of reducing sugar	0%
Which sugars are classified as reducing sugars	monosaccharides and some disaccharides	0%
what are molecules that bind to enzymes away from the active site	non competitive inhibitors	0%
What does a blue colour indicate in the Biuret test	no proteins are present	0%
What does a blue colour indicate in the reducing sugar test	no reducing sugar present	0%
What type of bond joins amino acids together	peptide bonds	0%
Which sugars are classified as non-reducing sugars	polysaccharides	0%
What does the Biuret test detect	presence of peptide bonds	0%
which structure is the unique sequence of amino acids in the polypeptide chain	primary	0%
What is formed during an enzyme-catalysed reaction	products	0%
What are non-protein groups added to the quaternary structure called	prosthetic	0%
What is the function of cellulose	provides strength and rigidity to plant cells	0%
what colour indicates present proteins	purple	0%
which structure has two or more polypeptide chains held together by bonds	quarternary	0%
what has a hydrocarbon chain saturated with hydrogen, with no carbon-carbon double bonds	saturated fatty acids	0%
which structure is the folding of the polypeptide chain into an alpha-helix or a beta-pleated sheet	secondary	0%
what are monosaccharides	simple sugars	0%
Why is glucose a good energy source	soluble	0%
What are phospholipids used as	structural components	0%
Name factors that affect the rate of enzyme-controlled reactions	temperature and ph/substrate and enzyme concentration	0%
which structure is the complex 3D structure formed by the folding and twisting of the polypeptide chain	tertiary	0%
What determines the properties of an amino acid	the R group	0%
What is the main role of carbohydrates in living organisms	to provide energy for cells	0%
What is the primary function of triglycerides	to store energy	0%
what is the main function of disaccharides	transport	0%
what has a hydrocarbon chain with at least one carbon-carbon double bond, causing the chain to kink	unsaturated fatty acids	0%

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Biology topic 1 - Statistics