74012 - Study guides, Class notes & Summaries

2023 AQA AS BIOLOGY PAPER 2 QUESTION PAPER AND MARK SCHEME 74012 BUNDLE

AQA AS BIOLOGY 7401/2 Paper 2 Mark scheme June 2023 Version: 1.0 Final

AQA AS BIOLOGY 74012 PAPER 2 QUESTION PAPER AND MARK SCHEME [WELL VERIFIED ANSWERS] GRADED A+ Name two biological molecules that can be coded for by a gene. - ANS---rRNA; (Pre) mRNA; tRNA; Use the data in Table 1 to suggest how the structure of rough endoplasmic reticulum is different from the structure of smooth endoplasmic reticulum and how this is related to their functions. - ANS---1. Less phospholipids in rough 2. (More protein/glycoprotein/ribosomes) Rough - production/...

aqa AS BIOLOGY (7401/2) Paper 2 Mark scheme for June 2023 Version: 1.0 Final

AQA AS Biology 7401/2 Paper 2 June 2024

Endopeptidases and exopeptidases are involved in the hydrolysis of proteins. Name the other type of enzyme required for the complete hydrolysis of proteins to amino acids. [1 mark] 0 1 . 2 Suggest and explain why the combined actions of endopeptidases and exopeptidases are more efficient than exopeptidases on their own. [2 marks] 3 *03* Turn over ► IB/M/Jun16/E4 Do not write outside the box 0 1 . 3 Figure 1 shows the co-transport mechanism for the absorption of amino acids into ...

AQA AS Biology 7401/2 Paper 2 June 2024

Mark scheme instructions to examiners 1. General The mark scheme for each question shows: • the marks available for each part of the question • the total marks available for the question • the typical answer or answers which are expected • extra information to help the examiner make his or her judgement and help to delineate what is acceptable or not worthy of credit or, in discursive answers, to give an overview of the area in which a mark or marks may be awarded. The extra inf...

1 Endopeptidases and exopeptidases are involved in the hydrolysis of proteins. Name the other type of enzyme required for the complete hydrolysis of proteins to amino acids. [1 mark] 0 1 . 2 Suggest and explain why the combined actions of endopeptidases and exopeptidases are more efficient than exopeptidases on their own. [2 marks] 3 *03* Turn over ► IB/M/Jun16/E4 Do not write outside the box 0 1 . 3 Figure 1 shows the co-transport mechanism for the absorption of amino acids int...

Mark scheme instructions to examiners 1. General The mark scheme for each question shows: • the marks available for each part of the question • the total marks available for the question • the typical answer or answers which are expected • extra information to help the examiner make his or her judgement and help to delineate what is acceptable or not worthy of credit or, in discursive answers, to give an overview of the area in which a mark or marks may be awarded. The extra inf...