Human fertilisation - Samenvattingen, Aantekeningen en Examens

Explain how the structure of DNA is related to its functions (6 marks) - sugar-phosphate (backbone)/double stranded/helix so provides strength/stability/protects bases/protects hydrogen bonds - long/large molecule so can store lots of information - helix/coiled so compact - base sequence allows information to be stored/ base sequence codes for amino acids/protein - double stranded so replication can occur semi-conservatively/strands can act as templates/complementary base pairing/A-T and G-...

Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. GCSE BIOLOGY Higher Tier Paper 2H H 2 *02* IB/M/Jun21/8461/2H Answer all questions in the spaces provided. 0 1 The nucleus of a cell contains DNA. 0 1 . 1 Name the structures inside the cell nucleus that contain DNA. [1 mark] Figure 1 shows part of a DNA molecule. Figure 1 0 1 . 2 Name the part of the DNA molecule labelled X. [1 mark] ...

Does Maternal Age Affect Children’s Test Scores?* Andrew Leigh Economics Program Research School of Social Sciences Australian National University Xiaodong Gong Australian Treasury Abstract We estimate the relationship between maternal age and child outcomes, using indices aimed at measuring overall outcomes, learning outcomes, and social outcomes. In all cases, we find evidence that children of older mothers have higher outcomes. Not only do children born to mothe...

AQA BIOLOGY ESSAY TITLES VERSION 2 Biology essay titles Version 2 This document contains the essay titles and mark schemes used in AQA A-level Biology examinations since 2007. The specifications these exam questions came from are no longer in use, but the marking method has largely remained unchanged. Further guidance on the marking method used with the essay can be found in Paper 3 Essay marking guidance. Year Questio nTitle 7402/3 2017 7.1 The impo...

Midwifery MCQ With Correct Answers Which hormone is produced by the corpus luteum? - ANS Progesterone Which stage of the menstrual cycle remains fairly constant regardless of the regularity of a woman's cycle? - ANS Luteal By how much does the body cells' need for oxygen increase in pregnancy? - ANS 20% Which structure carries oxygenated blood across the placenta to the fetus? - ANS Umbilical vein Which valve is situated between the left atrium and ventricle? -...

GCSE BIOLOGY F Foundation Tier Paper 2F Time allowed: 1 hour 45 minutes For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 10 TOTAL Materials For this paper you must have: • a ruler • a scientific calculator. Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at the top of this page. • Answer all questions in the spaces provided. • If you need extra space for your answer(s), u...

Powell v Kempton 1899 If a ring at a racecourse fell under the terms "house, office, room or other places" - decided not. R v Inhabitants of Sedgley 1831 If "lands, houses and coal mines: included other types of mine -decided it excluded application to others Muir v Keay 1875 "For public refreshment, resort and entertainment" - decided entertainment did not include theatrical/ musical entertainment Pepper v Hart 1993 Established the use of Hansard is permitted where the legislation is am...

IGCSE Edexcel Biology – Reproduction question and answer| graded A+ Asexual reproduction Process of reproduction that forms genetically identical offspring from 1 parent Sexual reproduction Process of reproduction that forms non identical offspring from 2 parents Features of asexual reproduction Cells divide by mitosis No gamete fusion Offspring are clones Only 1 parent Features of sexual reproduction Gametes formed by meiosis Male and female gametes fuse together...

homeostasis A tendency to maintain a balanced or constant internal state; the regulation of any aspect of body chemistry, such as blood glucose, around a particular level nervous system A conglomeration of billions of cells specifically designed to provide a communication network within the human body. receptors Special structures that allow living organisms to sense the conditions of their internal or external environment stimuli Changes, occurring within or outside the body, that affect...

Explain how the structure of DNA is related to its functions (6 marks) - answer-- sugar-phosphate (backbone)/double stranded/helix so provides strength/stability/protects bases/protects hydrogen bonds - long/large molecule so can store lots of information - helix/coiled so compact - base sequence allows information to be stored/ base sequence codes for amino acids/protein - double stranded so replication can occur semi-conservatively/strands can act as templates/complementary base pairing/A-...