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AQA GCSE Biology Paper 1 - Revision Questions With 100% ALL SURE ANSWERS
Terms in this set (21)
How is the real size of a magnified image Real size = Image size ÷ Total magnification.
calculated?
What is a eukaryotic cell? A cell with DNA inside a membrane bound nucleus. Prokaryotic cells do not have a nucleus.
Plant cells have a nucleus / plant cells have mitochondria / plant cells have chloroplasts / plant
Name two differences between a plant cell and a cells have a cellulose cell wall whereas bacteria do not contain any of these structures. Bacteria
bacterial cell? have chromosomal DNA not in a nucleus and have DNA plasmids whereas plant cells do not
contain these structures.
How can the rate of diffusion be increased? Higher temperature, Steeper concentration gradient, Shorter diffusion distance
Why are stem cells used in medicine? Treatment with stem cells may be able to help conditions such as diabetes and paralysis.
The active site of an enzyme is a specific shape, which is complimentary to its substrate - they fit
What is the lock and key model of enzyme action?
together like a lock and key to form an enzyme-substrate complex.
The active site changes shape and can no longer bind with the substrate. The enzyme will no
What happens when an enzyme is denatured?
longer function
What is the test for a reducing sugar (such as Heated with Benedict's reagent. A change in colour from blue to green, orange or brick-red are
AQA GCSE Biology Paper 1 - Revision Questions
glucose)? all positive results.
1/2
AQA GCSE Biology Paper 1 - Revision Questions With 100% ALL SURE ANSWERS
Terms in this set (21)
How is the real size of a magnified image Real size = Image size ÷ Total magnification.
calculated?
What is a eukaryotic cell? A cell with DNA inside a membrane bound nucleus. Prokaryotic cells do not have a nucleus.
Plant cells have a nucleus / plant cells have mitochondria / plant cells have chloroplasts / plant
Name two differences between a plant cell and a cells have a cellulose cell wall whereas bacteria do not contain any of these structures. Bacteria
bacterial cell? have chromosomal DNA not in a nucleus and have DNA plasmids whereas plant cells do not
contain these structures.
How can the rate of diffusion be increased? Higher temperature, Steeper concentration gradient, Shorter diffusion distance
Why are stem cells used in medicine? Treatment with stem cells may be able to help conditions such as diabetes and paralysis.
The active site of an enzyme is a specific shape, which is complimentary to its substrate - they fit
What is the lock and key model of enzyme action?
together like a lock and key to form an enzyme-substrate complex.
The active site changes shape and can no longer bind with the substrate. The enzyme will no
What happens when an enzyme is denatured?
longer function
What is the test for a reducing sugar (such as Heated with Benedict's reagent. A change in colour from blue to green, orange or brick-red are
AQA GCSE Biology Paper 1 - Revision Questions
glucose)? all positive results.
1/2
