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AQA A-Level Biology: Paper 1 Bundle With Complete Solutions
AQA A-Level Biology: Paper 1 Bundle With Complete Solutions
[Show more]AQA A-Level Biology: Paper 1 Bundle With Complete Solutions
[Show more]What is the function of the cell membrane? - ANSWER To control what enters and leaves the cell, acts as a barrier between the cell and its environment. 
 
What structural feature of the cell membrane allows substances to enter/leave? - ANSWER Partially permeable 
 
What is the fluid mosaic model? - ...
Preview 2 out of 13 pages
Add to cartWhat is the function of the cell membrane? - ANSWER To control what enters and leaves the cell, acts as a barrier between the cell and its environment. 
 
What structural feature of the cell membrane allows substances to enter/leave? - ANSWER Partially permeable 
 
What is the fluid mosaic model? - ...
Explain why plasma membranes are said to have a fluid mosaic structure. - ANSWER 1. Fluid because the phospholipids are constantly moving. 2. Mosaic because the proteins are scattered throughout the membrane-like tiles in a mosaic. 
 
What effect does cholesterol have on the cell membrane? - ANSWER ...
Preview 2 out of 13 pages
Add to cartExplain why plasma membranes are said to have a fluid mosaic structure. - ANSWER 1. Fluid because the phospholipids are constantly moving. 2. Mosaic because the proteins are scattered throughout the membrane-like tiles in a mosaic. 
 
What effect does cholesterol have on the cell membrane? - ANSWER ...
Give the 2 types of molecule from which a ribosome is made (2) - ANSWER 1. ribosomal Proteins 
2. ribosomal RNA 
 
Describe the role of a ribosome in the production of a polypeptide. Do not include transcription in your answer (3) - ANSWER 1. mRNA binds to ribosome 
2. allows tRNA with anticodons to...
Preview 1 out of 3 pages
Add to cartGive the 2 types of molecule from which a ribosome is made (2) - ANSWER 1. ribosomal Proteins 
2. ribosomal RNA 
 
Describe the role of a ribosome in the production of a polypeptide. Do not include transcription in your answer (3) - ANSWER 1. mRNA binds to ribosome 
2. allows tRNA with anticodons to...
1.1 Describe the induced fit model of enzyme action and how an enzyme acts as a catalyst. - ANSWER- The substrate binds to the active site and forms an ES complex. 
- The active site changes shape slightly so it's complimentary to the substrate. 
- This reduces the activation energy. 
 
1.2 Tick on...
Preview 2 out of 5 pages
Add to cart1.1 Describe the induced fit model of enzyme action and how an enzyme acts as a catalyst. - ANSWER- The substrate binds to the active site and forms an ES complex. 
- The active site changes shape slightly so it's complimentary to the substrate. 
- This reduces the activation energy. 
 
1.2 Tick on...
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