Hydrolyse Study guides, Revision notes & Summaries

AQA AS BIOLOGY 7401/2 Paper 2 Version: 1.0 Final *JUN* IB/M/Jun23/E9 7401/2 For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 10 TOTAL Thursday 25 May 2023 Morning Time allowed: 1 hour 30 minutes Materials For this paper you must have: • a ruler with millimetre measurements • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. • You must answer the question...

Describe the role of a ribosome in the production of a polypeptide. /3 - Correct answer1. 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 - Correct answer-1. Polysaccharide of α-glucose; OR polymer of α-glucose; 2. (Joined by) glycosidic bonds OR Branched structure; NHE3 ac...

sulfonamide inhibits correct answers dihydropteroate synthase cos it is PABA (p-aminobenzoic acid) analogue Trimethoprim inhibits ____ whats special bout the enzyme? correct answers dihydrofolate reductase --in both human and bacteria but trimethoprim is more sensitive to bacteria one (needs high concentration of drug to inhibit human one) 3 types of functions of selective toxicity correct answers diff in distribution--accummulate more in bacterial cell (tetracycline- bact cell has pu...

AQA A-Level Biology Comprehensive Exam || All Questions & Answers (Graded A+) AQA A-Level Biology Comprehensive Exam || All Questions & Answers (Graded A+) Describe the role of a ribosome in the production of a polypeptide. /3 - ANSWER - 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 g...

AQA A-level BIOLOGY 7402/2 Paper 2 Question Paper & Mark scheme June 2023 VERIFIED100%. Chemical digestion - -Hydrolyses large, insoluble molecules What is digestion - -Physical breakdown Chemical digestion Physical breakdown - --Breakdown of food into absorbable nutrients - By teeth - Stomach muscles - increases SA What is the importance of digestion? - -Hydrolyses large food molecules into smaller molecules Which can move across cell membrane And be absorbed into the blood Oe...

AS Biology Exam Style questions and answers 2023 with complete solution When HIV infects a human cell, the following events occur. -A single-stranded length of HIV DNA is made -The human cell then makes a complementary strand to the HIV DNA The complementary strand is made in the same way as a new complementary strand is made during semi-conservative replication of human DNA Describe how the complementary strand of HIV DNA is made. [3 marks] -complementary nucleotides/ base pairs ...

AQA AS BIOLOGY REVIEW TEST Monomer - ANSWER One of many small molecules that combine together to form a polymer Polymer - ANSWER Large molecule made up of many repeating smaller molecules (monomers). Polymerisation - ANSWER The process of making a polymer Condensation - ANSWER Chemical process in which two molecules combine to form a more complex one with the elimination of a simple substance, usually water. Many biological polymers (e.g. polysaccharides, polypeptides) are formed b...

AQA A-level BIOLOGY 7402/2 Paper 2 Question Paper & Mark scheme June 2023 VERIFIED100%. Chemical digestion - -Hydrolyses large, insoluble molecules What is digestion - -Physical breakdown Chemical digestion Physical breakdown - --Breakdown of food into absorbable nutrients - By teeth - Stomach muscles - increases SA What is the importance of digestion? - -Hydrolyses large food molecules into smaller molecules Which can move across cell membrane And be absorbed into the blood Oe...

AQA A-level BIOLOGY 7402/2 Paper 2 Question Paper & Mark scheme June 2023 VERIFIED100%. Chemical digestion - -Hydrolyses large, insoluble molecules What is digestion - -Physical breakdown Chemical digestion Physical breakdown - --Breakdown of food into absorbable nutrients - By teeth - Stomach muscles - increases SA What is the importance of digestion? - -Hydrolyses large food molecules into smaller molecules Which can move across cell membrane And be absorbed into the blood Oe...

AQA A-level BIOLOGY 7402/2 Paper 2 Question Paper & Mark scheme June 2023 VERIFIED100%. Chemical digestion - -Hydrolyses large, insoluble molecules What is digestion - -Physical breakdown Chemical digestion Physical breakdown - --Breakdown of food into absorbable nutrients - By teeth - Stomach muscles - increases SA What is the importance of digestion? - -Hydrolyses large food molecules into smaller molecules Which can move across cell membrane And be absorbed into the blood Oe...