Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
40 Cards in this Set
- Front
- Back
|
In which part of the cell is energy released during respiration ? |
MITOCHONDRIA |
|
|
why is it possible to see a bacterial colony but not an individual bacterium ? |
ONE BACTERIUM IS VERY SMALL , MANY BACTERIUM IN A COLONY CAN BE SEEN.
|
|
|
why do muscle cells need a lot of mitochondria ? |
MITOCHONDRIA RELEASE ENERGY WHICH MUSCLES NEED FOR MOVEMENT.
|
|
|
what determines the net movement of particles across a cell membrane ? |
THE CONCENTRATION ON EITHER SIDE OF THE MEMBRANE.
|
|
|
what does glandular tissue produce ? |
ENZYMES OR HORMONES
|
|
|
where is soluble food absorbed ? |
IN THE SMALL INTESTINES.
|
|
|
where does the energy from photosynthesis come from ? |
SUNLIGHT , ALTHOUGH ARTIFICIAL LIGHT CAN ALSO CAN BE USED IN EXPERIMENTS.
|
|
|
why do enzyme reaction slow down ? |
WHEN THE TEMPERATURE FAILS THE ENZYMES SLOW DOWN.
|
|
|
what is meant by the term ' dependent ' ? |
THE VARIABLE THAT IS BEING MEASURED.
|
|
|
name three substances used for storage in plants. |
STARCH , FATS AND OILS .
|
|
|
what factors need to be controlled in a green house to improve the growth of plants ? |
LIGHT , TEMPERATURE AND CARBON DIOXIDE.
|
|
|
why are there so few animals living in very cold conditions such as the arctic ? |
VERY FEW PLANT GROW THERE - THIS MEANS THAT THERE INST ENOUGH FOOD RESOURCES THEREFOR NOT MANY ANIMALS CAN SURVIVE THERE.
|
|
|
what is a quadrat ? |
A SQUARE FRAME WHICH MAY BE SPLIT INTO A GRID .
|
|
|
How can you make sure an investigation is valid ? |
ONLY THE INDEPENDENT VARIABLE SHOULD AFFECT THE RESULT'S, OF THE OTHER VARIABLES MUSTS BE CONTROLLED.
|
|
|
what are the proteins made of ? |
LONG CHAINS OF AMINO ACIDS.
|
|
|
what is meant by the term ' denatured ' ? |
THE PROTEIN /ENZYME CHANGES SHAPE AND WILL STOP WORKING.
|
|
|
which enzyme digest starch ? |
AMYLASE
|
|
|
where is bile produced ? |
IN THE LIVER
|
|
|
which enzyme is used to convert glucose to fructose ? |
ISOMERASE
|
|
|
How do enzymes get into rivers ? |
WATER FROM DISHWASHERS AND WASHING MACHINES PASSES INTO THE SEWAGE SYSTEM AND MAY EVENTUALLY REACH THE RIVERS. |
|
|
Where does aerobic respiration take place ? |
IN THE MITOCHONDRIA
|
|
|
Which sugar is needed by the muscles for aerobic respiration ? |
GLUCOSE
|
|
|
Which type of cell division produces two identical cells from the original cell ? |
MITOSIS
|
|
|
What type of cells are produced by meiosis ? |
SEX CELLS OR GAMETES , EGGS AND SPERM.
|
|
|
Explain how four gametes are formed from one cell |
THERE ARE TWO SETS OF CELL DIVISION.A BODY CELL DIVIDES INTO TWO AND EACH DIVIDES AGAIN.
|
|
|
Where are stem cells found in an adult human ? |
BONE MARROW
|
|
|
Which scientist worked out the characteristics are inherited? |
MENDEL
|
|
|
what does a gene code for ? |
THE ORDER OF AMINO ACIDS INA PROTEIN .
|
|
|
Which sex chromosomes are found in human males ? |
X AND Y
|
|
|
What is meant by the term ' phenotype' ? |
THIS IS A DESCRIPTION OF THE PHYSICAL CHARACTERISTICS.
|
|
|
Name a genetic disorder is controlled by a dominant allele. |
POLYDACTYLY
|
|
|
What are the chances of having a child with
cystic fibrosis is one parent has the disorder and the other parent is heterozygous ? |
50%AS ONE PARENT (cc) HAS TO PASS O THE ALLELE, THE OTHER PARENT (Cc) HAS A 50% RISK OF PASSING ON ; THE CHILD EITHER Cc OR cc.
|
|
|
What is embryo screening ? |
TESTS ARE CARRIED OUT ON THE EMBRYO TO DIAGNOSE POSSIBLE DISORDERS.
|
|
|
Name a hard part of an animal which will not decay ? |
ONE OF : BONES ,TEETH , SHELLS , CLAWS
|
|
|
Why are some fossils destroyed over time ? |
DUE TO GEOLOGICAL ACTIVITY WHICH BREAKS THEM UP OR WEARS THEM AWAY .
|
|
|
How can a new predator cause an extinction of species ? |
IT EATS ALL THE ANIMALS.
|
|
|
Suggest another factor which could have caused the dinosaurs to die out . |
A NEW DISEASE BEING INTRODUCED INTO THE POPULATION. IT IS UNLIKELY TO BE A NEW PREDATOR BECAUSE DINOSAURS WHERE AT THE TOP OF THE FOOD CHAIN.
|
|
|
How do populations become isolated ? |
ISLANDS BREAK AWAY FROM THE MAINLAND , NEW RIVERS FORM , MOUNTAIN RANGES OR CRATERS SEPARATE THEM
|
|
|
What is meant by genetic variation ? |
THE WIDE RANGE OF ALLELES THAT CONTROL THE CHARACTERISTICS IN THE POPULATION.
|
|
|
What is meant by extinction ? |
THE PERMANENT LOSS OF ALL MEMBERS OF A SPECIES. |
