AQA A LEVEL BIOLOGY PAPER 1

AQA A-level Biology paper 1 Rated A large molecules often contain carbon. why? Ans- they can readily form bonds with other carbon atoms. this forms a 'backbone'. other atoms can then attach. describe benedicts test for reducing sugars Ans- add equal volumes of the sugar sample and benedicts reagent. heat the mixture in a water bath for 5 minutes. brick red precipitate will form. what is a reducing sugar? Ans- a sugar that can reduce (give electrons to) another chemical. describe the ...

AQA A-Level Biology Paper 1 Describe the role of a ribosome in the production of a polypeptide. /3 Ans- 1. mRNA binds to ribosome; 2. Idea of TWO codons/binding sites; 3. tRNA with ANTICODONS binds; 4. (Catalyses) formation of PEPTIDE bond between AMINO ACIDS (held by tRNA molecules); 5. Moves along (mRNA to the next codon); Describe the structure of glycogen. /2 Ans- 1. Polysaccharide of α-glucose; OR polymer of α-glucose; 2. (Joined by) glycosidic bonds OR Branched structure; NH...

AQA A-Level Biology Paper 1 2023 Describe the role of a ribosome in the production of a polypeptide. /3 Ans- 1. mRNA binds to ribosome; 2. Idea of TWO codons/binding sites; 3. tRNA with ANTICODONS binds; 4. (Catalyses) formation of PEPTIDE bond between AMINO ACIDS (held by tRNA molecules); 5. Moves along (mRNA to the next codon); Describe the structure of glycogen. /2 Ans- 1. Polysaccharide of α-glucose; OR polymer of α-glucose; 2. (Joined by) glycosidic bonds OR Branched structure...

AQA A-Level Biology Paper 1 2023 Describe the role of a ribosome in the production of a polypeptide. /3 Ans- 1. mRNA binds to ribosome; 2. Idea of TWO codons/binding sites; 3. tRNA with ANTICODONS binds; 4. (Catalyses) formation of PEPTIDE bond between AMINO ACIDS (held by tRNA molecules); 5. Moves along (mRNA to the next codon); Describe the structure of glycogen. /2 Ans- 1. Polysaccharide of α-glucose; OR polymer of α-glucose; 2. (Joined by) glycosidic bonds OR Branched structure...

AQA A LEVEL BIOLOGY PAPER 1 7402-1 2021 MARK SCHEME MSA-level BIOLOGY 7402/1 Paper 1 Mark scheme June 2021 Version: 1.0 Final A+ *216a7402/1/MS* A+ MARK SCHEME – A-LEVEL BIOLOGY – 7402/1 – JUNE 2021 Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates participate in and is the scheme which was...

AQA A-LEVEL BIOLOGY PAPER 1 MARKING SCHEME 2022

AQA A LEVEL BIOLOGY PAPER 1 Exam (elaborations)

A-level BIOLOGY 7402/1 Paper 1 Mark scheme June 2020 Version: 1.0 Final *206A7402/1/MS* @gatuso Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates participate in and is the scheme which was used by them in this examination. The standar...

AQA A-LEVEL BIOLOGY PAPER 1 2021

AQA A LEVEL BIOLOGY PAPER 1