Combined Science Biology Paper 1(GCSE AQA) Prep Exam And Correct Answers.
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Course
Combined Science
Institution
Combined Science
Gene - Answer a segment of DNA that determines characteristics of your body
How many chromosomes do humans have? - Answer 46 (23 pairs)
How many chromosomes do gametes (sex cells) have? - Answer 23
Mitosis - Answer The process of cell division, resulting in two identical cells
...
embroyonic stem cells - Answer Inner cells of the embryo
Embryo - Answer One half of the zygote
adult stem cells - Answer An undifferentiated cell of any organism that can rise to many more cells of
the same type
Problems with embryonic stem cells - Answer -Human rights debate
-Slow, expensive, unpredictable
-Possibly cause cancer
-Potentially infected with viruses
Therapeutic cloning - Answer research using cells from an adult to produce a cloned embryo of
themselves
Stem call research could possibly treat: - Answer -Spinal cord injuries
-Diabetes
-Eyesight
-Heart damage
-Damaged bone and cartilage
, Tissue - Answer A group of similar cells that perform the same function.
Organs - Answer Groups of tissues that work together to perform a specific function or related
functions
Organ system - Answer group of organs that work together to perform a specific function
Organ Systems in our body - Answer Digestive system, respiratory system, and the circulatory system
Levels of organization (small to large) - Answer cell, tissue, organ, organ system, organism
Digestive system - Answer body system the breaks down food and absorbs nutrients (digestion occurs)
Enzymes - Answer break down large molecules for digestion to occur
Small intestine - Answer absorption of molecules into your blood
Function of muscular walls of the small intestine - Answer Squeeze undigested food into your large
intestine
Liver - Answer produces bile
Stomach - Answer breaks down and digests food into order to extract nutrients
Large intestine - Answer absorbs water and leaves waste to be stored and passed out as faeces
Main compounds of a cell - Answer Carbohydrates, lipids and proteins
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