0610_m18_qp_32
A paper of Biology, 0610
Questions:
10
Year:
2018
Paper:
3
Variant:
2
Login to start this paper & get access to powerful tools
4
The kidneys excrete excess water in urine. The main component of urine is water. State two other substances that are excreted by healthy kidneys. A scientist investigated the effect of drinking sugar solutions, of different concentrations, on the volume of urine produced. • 1.5 dm3 of sugar solution A was consumed by a healthy adult. • Urine was collected at thirty minute intervals for 150 minutes. • The volume of urine produced every thirty minutes was added to the previous total volume. • This procedure was repeated with sugar solutions B and C. The results are shown in . 1.0 1.1 1.2 1.3 time / minutes total volume of urine collected / dm3 solution A solution B solution C Complete Table 4.1 using the information in . Table 4.1 description of measurement volume / dm3 total volume of urine produced 60 minutes after drinking solution C volume of urine produced between 30 minutes and 60 minutes after drinking solution B total volume of urine produced 150 minutes after drinking solution A Suggest which of the three solutions, A, B or C, contained the most sugar. Give a reason for your suggestion. solution reason List two factors that will affect the volume and concentration of urine produced. The body loses water in the urine. State two other ways in which the body loses water.
13. Excretion in humans  →  13.1. Excretion in humans
Open
5
shows a diagram of a cell found in leaves. F G H State the names of structures F, G and H. Write your answers on . On draw: a line labelled K to show where the chromosomes are found a line labelled L to show the position of the cell membrane. State the name of this type of plant cell. The cell in was placed in a concentrated glucose solution. shows the appearance of the cell after ten minutes in the glucose solution. State two ways in which the cell has changed. Water moves into and out of the cell by osmosis. Osmosis is a form of diffusion. Describe the ways in which diffusion is different to active transport.
3. Movement into and out of cells  →  3.2. Osmosis
2. Organisation of the organism  →  2.1. Cell structure
Open
6
This question is about enzymes. Choose words from the list to complete the sentences. Each word may be used once, more than once, or not at all. amino acids amylase bacteria biological fatty acids glucose humidity lipase living protease salivary temperature All enzymes are proteins. Proteins are made of . An enzyme acts as a catalyst. In order to work rapidly, enzymes need the correct and pH. An example of an enzyme that works in the acidic conditions in the stomach is . Acidic conditions will kill many of the present in food. Salivary stops working in acidic conditions. Fats are broken down by .
5. Enzymes  →  5.1. Enzymes
7. Human nutrition  →  7.4. Chemical digestion
Open
7
Some animals produce milk to feed their offspring. Table 7.1 shows the mass of the substances found in 100 g of milk from two animals. Table 7.1 substance mass in 100 g of milk / g human milk water buffalo milk protein 1.10 4.50 fat 4.50 8.00 carbohydrate 7.50 4.90 calcium 0.03 2.00 water Calculate the mass of water in both the human milk and the water buffalo milk. Write your answers in Table 7.1. Space for working. State the name of the substance in Table 7.1 that is present in a higher concentration in human milk than in water buffalo milk. State the name of one component of a balanced diet that is missing from Table 7.1. Producing milk for offspring is a characteristic of a particular group of animals. State the name of this group of animals. State how young animals use the substances listed in Table 7.1. protein fat carbohydrate calcium water An adult eats a high-fat diet. State two health problems that could be caused by eating a high-fat diet.
21. Biotechnology and genetic modification  →  21.2. Biotechnology
7. Human nutrition  →  7.1. Diet
4. Biological molecules  →  4.1. Biological molecules
Open
8
Define the term pollination. Fig 8.1 shows a flower that reproduces using wind-pollination. Describe two ways in which the flower in is adapted for wind-pollination. shows two photomicrographs of pollen. pollen from an insect-pollinated flower magnification × 1250 pollen from a wind-pollinated flower magnification × 2000 Describe, using your knowledge and the information in , how pollen from an insect-pollinated flower is different to pollen from a wind-pollinated flower. Sexual reproduction in plants results in seeds being formed. State three conditions needed for the germination of seeds.
16. Reproduction  →  16.3. Sexual reproduction in plants
Open
9
Some insects can reproduce by sexual reproduction and asexual reproduction. In both types of reproduction chromosomes are passed from the parent or parents, to the offspring. shows a drawing of a parent insect and seven of her offspring: M, N, P, R, S, T and U. parent insect M N P R S T U Two of the offspring were produced by asexual reproduction. Suggest the letters representing these two offspring. Insect R was produced by sexual reproduction. Use the information from the diagram to support this statement. State the term that is defined as the observable features of an organism. shows a group of male students. They are all the same age. The students in show continuous variation in some of their characteristics. State three characteristics in which these students show continuous variation. State one example of discontinuous variation.
16. Reproduction  →  16.3. Sexual reproduction in plants
16. Reproduction  →  16.1. Asexual reproduction
Open