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Combined Science Biology Paper 1(GCSE AQA) Prep Exam And Correct Answers. $9.99   Add to cart

Exam (elaborations)

Combined Science Biology Paper 1(GCSE AQA) Prep Exam And Correct Answers.

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  • Course
  • Combined Science
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  • 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 ...

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  • October 25, 2024
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Combined Science Biology Paper
1(GCSE AQA) Prep Exam And Correct
Answers.
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



The cell cycle - Answer The cycle of your body's cells dividing in a series of stages



How long does the cell cycle take? - Answer Anywhere from 24 hours to years (depending on the
organisms stage of life)



Cell division in organisms - Answer Pre-born baby- quick and constant

Child afterbirth- Fairly rapid

End of Puberty and Adulthood- slows drastically



Stage 1- Cell Cycle - Answer -Longest stage

-Grows bigger

-Increased mass

-Duplicate their DNA

-Increase number of ribosomes, mitochondria, etc. for cell divide



Stage 2- Cell Cycle - Answer -Mitosis occurs

,-Organelles get pulled apart and nucleus splits



Stage 3- Cell Cycle - Answer -Cytoplasm and Cell membrane split

-Two identical daughter cells



Cloning - Answer Producing identical offspring



Zygote - Answer A fused egg and sperm cell



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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