Biology - unit 1

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  • Created by: Daniel
  • Created on: 06-01-20 10:25
what is meant by the term eukaryotic.
Membrane bound organelle
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what is Identify the cellular structure found in both animal and plant cells.
Mitochondria
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A eukaryotic cell has an actual diameter of 25μm. The observed diameter of the eukaryotic cell in a photomicrograph is 1.5cm. Calculate the magnification used to view the image.
600x
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Name the two contractile proteins found in a skeletal muscle myofibril.
Myosin and actin
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Name the cell surface membrane of a skeletal muscle cell.
Sarcolemma
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Skeletal muscle contains large stores of glycogen. Explain the function of glycogen in skeletal muscle.
To provide energy. contraction of muscles.Produce ATP
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Explain how having more mitochondria in their muscle fibres enables marathon runners to run for longer distances than sprinters.
Aerobic respiration. Atp energy. Lactic acid
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Explain how imbalances in serotonin in the brain may affect a person’s mood.
Lower levels of serotonin cause fewer receptors to be stimulated meaning fewer impulses are going to the brain so this may lead to depression (or opposite)
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Explain how the structure of red blood cells enables them to transport oxygen around the body. (6 marks)
Contains lots of hemoglobin. (hemoglobin contains 4 oxygen molecules). no nucleus/mitochondria/ribosomes/organelles. meaning increased space for hemoglobin. Biconcave. small in size. increased surface area to volume ratio.
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Name two functions of plasmids in bacteria
Either; They may contain genes that enhance the survival of an organism or by defending the host cell by producing toxins Some plasmids facilitate the process of replication in bacteria
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Identify the function of the nucleolus.
makes RNA and ribosomes
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Other cards in this set

Card 2

Front

what is Identify the cellular structure found in both animal and plant cells.

Back

Mitochondria

Card 3

Front

A eukaryotic cell has an actual diameter of 25μm. The observed diameter of the eukaryotic cell in a photomicrograph is 1.5cm. Calculate the magnification used to view the image.

Back

Preview of the front of card 3

Card 4

Front

Name the two contractile proteins found in a skeletal muscle myofibril.

Back

Preview of the front of card 4

Card 5

Front

Name the cell surface membrane of a skeletal muscle cell.

Back

Preview of the front of card 5
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