Phospholipid - Study guides, Class notes & Summaries

2024 AQA AS BIOLOGY 7401/1 Paper 1 Question Paper & Mark scheme (Merged) June 2023 VERIFIED / Biology AQA AS level 7401/1 Paper 1 Describe the induced-fit model of enzyme action - ANSWER-- active site not complementary to/does not fit substrate - Shape of active site changes as enzyme- substrate complex forms - Distorting bonds (in substrate leading to reaction) • The human cell then makes a complementary strand to the HIV DNA. The complementary strand is made in the same way as a ne...

AQA AS BIOLOGY 7401/1 Paper 1 Version: 1.0 Final *JUN* IB/M/Jun23/E8 7401/1 For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 TOTAL Monday 15 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 questions in t...

Growth factors stimulate what? (A) cyclin production. (B) the cell to skip the S and G1 phases of interphase and undergo mitosis directly. (C) Cdk's to synthesize enzymes that digest cyclins. (D) the cell to ignore the checkpoints of the cell cycle. (E) NONE OF THE ABOVE - Answer (A) cyclin production What is a major difference between mitosis and meiosis? (A) Meiosis produces two daughter cells instead of the four daughter cells produced in mitosis. (B) Meiosis produces genetically ide...

Phospholipid Bilayer New Update Exam...

Phospholipid Bilayer Exam Questions And Correct Answers...

2. Antiphospholipid antibodies and cerebral thrombosis 2.1. Lupus anticoagulant In neonates and children, LAC are sometimes found incidentally due to prolongation of activated partial thromboplastin time (20). As LAC can be transient and associated with infections and transplacental passage (21, 22), they are not usually associated with clinically relevant complications (23). Therefore, the differentiation between de novo and acquired LAC has important therapeutic implications and is c...

emographics Patients fulfilling Sapporo classification criteria Group with transiently positive aCL Group with low positive aCL Number of patients N = 26 N = 7 N = 12 Median age (years) 37.6 (6–63) 35.4 (16–51) 41.6 (19–59) Number of episodes/patient 1 194 6 2 736 Clinical presentations N = 33 N = 10 N = 18 Superior sagittal sinus thrombosis 1 1 - Higher centre function loss 3 1 1 Left hemiparesis/paraesthesia 10 5 6 Right hemiparesis/paraesthesia 6 - 2 Brainstem/cerebel...

Phospholipid Bilayer Exam With Verified Solution @ 2024...

Glycoproteins Ans: carbohydrate attatched to a protein (plays role in cell recognition as well as communication) carbohydrate Ans: long chains of sugars Glycolipids Ans: attached to lipid bilayer itself (plays role in cell recognition as will as communication) Phospholipid tails Ans: no polar, hydrophobic Phospholipid head Ans: polar, hydrophilic 2 peripheral protein Ans: (on outside) can release certain molecules cholesterol Ans: helps keep the rigidity, keeps things together ...

The structure of the membrane is directly related to its? Ans: function Membranes Create ______ environments Ans: two : inside and out Membranes ultimately have to separate two ??? Ans: regions of water organelle membranes Ans: also separate their inner environment from the inside of the cell key property of water that influences the structure of membranes Ans: it's polar and partially changed and hydrophillic 2 Hydrophobic molecules can reorganize ____ Ans: water membrane lipids a...