BIOLOGY Higher Tier Paper 1H

GCSE BIOLOGY Higher Tier Paper 1H Time allowed: 1 hour 45 minutes 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), use the lined pages at the end of this book. Write the question number against your answer(s). • Do all rough work in this book. Cross through any work you do not want to be marked. • In all calculations, show clearly how you work out your answer. Information • The maximum mark for this paper is 100. • The marks for questions are shown in brackets. • You are expected to use a calculator where appropriate. • You are reminded of the need for good English and clear presentation in your answers. *JUN22 4611H01* IB/M/Jun22/E20 8461/1H There are no questions on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED box Answer all questions in the spaces provided. box This question is about cells and transport. . Complete Table 1. [3 marks] Table 1 Name of cell part Function of cell part Contains genetic information Mitochondria Controls the movement of substances into and out of the cell Cells in potatoes are plant cells. Cells in potatoes do not contain chloroplasts. . What is the function of chloroplasts? [1 mark] . Name one type of cell in a potato plant that does not contain chloroplasts. [1 mark] Question 1 continues on the next page Turn over ► A student investigated the effect of salt concentration on pieces of potato. This is the method used. 1. Cut three pieces of potato of the same size. 2. Record the mass of each potato piece. 3. Add 150 cm3 of 0.4 mol/dm3 salt solution to a beaker. 4. Place each potato piece into the beaker. 5. After 30 minutes, remove each potato piece and dry the surface with a paper towel. 6. Record the mass of each potato piece. 7. Repeat steps 1 to 6 using different concentrations of salt solution. box . What is the independent variable in the investigation?