Biology > AQA > AQA A Level Biology Paper 1 7402-1 Question Paper June 2021 Version 1.0 Final (All)

AQA A Level Biology Paper 1 7402-1 Question Paper June 2021 Version 1.0 Final

Document Content and Description Below

0 1 . 1 Describe the induced-fit model of enzyme action and how an enzyme acts as a catalyst. Scientists investigated the action of the enzyme ATP synthase. They made reaction mixtures each conta... ining: •ATP synthase •buffer (to control pH) •substrates. One of the substrates required in these reaction mixtures is inorganic phosphate (Pi). Tick () one box to show which other substrate the scientists must add to the reaction mixtures to produce ATP. [1 mark] Adenine Adenosine diphosphate Glucose Ribose The scientists investigated the effect of concentration of inorganic phosphate (Pi) on ATP synthase activity. After 2 minutes, they stopped each reaction and then measured the concentration of ATP. Figure 1 shows the scientists’ results. Crystallin is a structural protein found in the human eye. An inherited disease that leads to blindness is caused by changes in properties of crystallin. The replacement of the amino acid Arg with the amino acid Gly causes these changes. Use information in Table 2 to suggest why this amino acid replacement changes the properties of crystallin. [Show More]

Last updated: 1 year ago

Preview 1 out of 2 pages

Add to cart

Instant download


Buy this document to get the full access instantly

Instant Download Access after purchase

Add to cart

Instant download

Reviews( 0 )



Add to cart

Instant download

Can't find what you want? Try our AI powered Search



Document information

Connected school, study & course

About the document

Uploaded On

Jul 30, 2022

Number of pages


Written in



Member since 1 year

16 Documents Sold

Additional information

This document has been written for:


Jul 30, 2022





Document Keyword Tags

Recommended For You

Get more on AQA »

What is Browsegrades

In Browsegrades, a student can earn by offering help to other student. Students can help other students with materials by upploading their notes and earn money.

We are here to help

We're available through e-mail, Twitter, Facebook, and live chat.
 Questions? Leave a message!

Follow us on

Copyright © Browsegrades · High quality services·