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Biology GCSE Questions & 100% Correct Answers- Latest Test | Graded A+ | Passed
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What are the parts of an animal (and plant) cell? ֎ -:- Nucleus ֎ Cytoplasm ֎ Cell membrane ֎ Mitochondria What are parts of a plant cell? ֎ -:- Rigid cell wall ֎ Large vacuole ֎ Chloroplasts ֎ (nucleus, cytoplasm, cell membrane and mitochondria) What does the nucleus do? ֎ ...

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  • August 27, 2024
  • 51
  • 2024/2025
  • Exam (elaborations)
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  • biology gcse questions 100 correct answers la

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Biology GCSE Questions & 100% Correct
Answers- Latest Test | Graded A+ | Passed
What are the parts of an animal (and plant) cell?


֎ -:- Nucleus

֎ Cytoplasm

֎ Cell membrane

֎ Mitochondria




What are parts of a plant cell?


֎ -:- Rigid cell wall

֎ Large vacuole

֎ Chloroplasts

֎ (nucleus, cytoplasm, cell membrane and mitochondria)




What does the nucleus do?


֎ -:- Contains DNA that controls what the cell does




What does the cytoplasm do?


֎ -:- Its a gel-like substance where most of the chemical reactions happpen




What does the cell membrane do?



26/08/2024 | © Copyright- This work may not be copied for profit.

, Excellence is key | 2024/2025 ~Page |2


֎ -:- Holds the cell together and controls what goes in and out




What does the mitochondria do?


֎ -:- This is where most of the reactions for respiration take place. Respiration

releases energy that the cell needs to work.




What does the rigid cell wall do?


֎ -:- It is made up of cellulose and it gives support for the cell




What does the large vacuole do?


֎ -:- Contains cell sap, a weak solution of sugar and salts




What do chloroplasts do?


֎ -:- This is where photosynthesis occurs. They contain a green substance called

chlorophyll.




What are the features of a bacteria cell?


֎ -:- Chromosomal DNA

Plasmids


Flagellum


Cell wall


26/08/2024 | © Copyright- This work may not be copied for profit.

, Excellence is key | 2024/2025 ~Page |3




What is chromosomal DNA?


֎ -:- Chromosomal DNA controls the cells activities and replication. It floats free

in the cytoplasm.




What are plasmids?


֎ -:- Plasmids are small loops of extra DNA that aren't part of the chromosome.

Plasmids contain genes for things like drug resistance and can be passed

between bacteria.




What is the flagellum?


֎ -:- The flagellum is a long, hair-like structure that rotates to make the

bacterium move.




What does the cell wall do?


֎ -:- Support the cell




What is magnification?


֎ -:- How much bigger the image is that the specimen




How do you work out magnification?


26/08/2024 | © Copyright- This work may not be copied for profit.

, Excellence is key | 2024/2025 ~Page |4


֎ -:- length of image / length of specimen




What is the difference between light microscopes and electron microscopes?


֎ -:- Light microscopes let us see things like the nuclei, chloroplasts and

mitochondria. Electron microscopes let us see much smaller things in more

detail like the internal structure of mitochondria and chloroplasts and even

tinier things like plasmids.




What is DNA?


֎ -:- DNA is the complex chemical that carries genetic information. DNA is

found in chromosomes which are found in the nucleus of most cells.




What is the structure of DNA? (6marker)


֎ -:- -A DNA molecule has two strands coiled together in the shape of a double

helix.

-The two strands are hold together by chemicals called bases. The four bases are adenine,

thymine, guanine and cytosine.


-The bases are paired, and they always pair up in the same way; A-T and C-G. This is called

base pairing.


-The base pairs are joined together by weak hydrogen bonds.




26/08/2024 | © Copyright- This work may not be copied for profit.

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