NYGH 2021-S3EOY-IP Bio P1

Class Register Number Name End-of-Year Examination 2021 Secondary Three IP BIOLOGY Paper 1 Multiple Choice 45 minutes Thursday 7 October 2021 1130 – 1215 Additional materials: OAS READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Write your name, register number and class at the top of this page and on the OAS in the spaces provided. There are thirty questions in this paper. Answer all questions. For each question there are four possible answers, A, B, C and D. Choose the one you consider correct and record your choice in pencil on the separate OAS provided. Read the instructions on the OAS very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate. Setter: LZJ, TZZ This document consists of 16 printed pages. NANYANG GIRLS’ HIGH SCHOOL [Turn over

2021 End-of Year-Examination Secondary Three IP 2 Nanyang Girls’ High School IP Biology 1 Which row is correct in matching the tissue to the correct organ found in a living organism? organ tissue A brain hepatic cells B leaf mesophyll cells C oesophagus hepatic cells D stem mesophyll cells 2 Brefeldin A is a drug that inhibits the formation of vesicles at the rough endoplasmic reticulum. What are the other cell structures that will be affected by this drug? A lysosomes and centrioles B lysosomes and cell membrane C cytoplasm and ribosomes D nucleus and cell wall 3 Cyanobacteria are prokaryotes capable of performing photosynthesis. Which of these structures are present in the cyanobacteria? endoplasmic reticulum ribosome chloroplast B D C A

2021 End-of-Year-Examination Secondary Three IP 3 Nanyang Girls’ High School IP Biology [Turn over 4 A gene contains 900 phosphate groups. How many bases will the gene contain? A 450 B 900 C 1800 D 2700 5 Some of the processes of protein synthesis are listed. 1. hydrolysis of amino acids 2. positioning of adjacent amino acids 3. formation of polypeptide chains 4. binding of amino acids to mRNA Which of these processes are correct? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4 6 The order of bases in a short length of one strand of DNA is shown below. G A A T T A What is the sequence on the other strand of DNA and its mRNA? the sequence on the other DNA strand the sequence on the mRNA molecule A TAATTC CTTAAT B TAATTC GAATTA C CTTAAT CUUAAU D CUUAAU GAAUUA

2021 End-of Year-Examination Secondary Three IP 4 Nanyang Girls’ High School IP Biology 7 Which of the following statements are always true of dominant alleles? 1. They cannot undergo mutation. 2. They give a better advantage to the organism than the recessive allele. 3. They give the same phenotype in heterozygotes and homozygotes. 4. They occur more frequently in the population than the recessive alleles. 5. They occupy the same position as the recessive allele on a pair of homologous chromosomes. A 1, 2 only B 3 and 4 only C 3 and 5 only D 3, 4 and 5 only 8 The inheritance of blood type is an example of codominance in humans. What are the possible blood types of children born to a woman who is heterozygous for her blood type and a man with blood type AB? A A and AB only B A and B only C A, AB and O only D A, AB and B only 9 Haemophilia is a sex-linked recessive condition. A haemophiliac man has one son who has inherited haemophilia and two more sons who have not. The man’s wife is pregnant again. If this baby is a girl, what is the chance that she will have haemophilia? A 0 % B 25 % C 50 % D 75 %

2021 End-of-Year-Examination Secondary Three IP 5 Nanyang Girls’ High School IP Biology [Turn over 10 The figure below shows the changes in the amount of DNA in a cell over a period of time. What is represented by P, Q and R? P Q R A cytokinesis interphase fertilisation B fertilisation interphase cytokinesis C interphase fertilisation anaphase D prophase interphase anaphase 11 Which stages of mitosis ensure that each daughter cell has received a chromatid from each replicated chromosome? A anaphase and metaphase B anaphase and telophase C interphase and prophase D metaphase and prophase 12 Which of the statement(s) about cytokinesis is/are true? 1. cell structures replicate 2. formation of cleavage furrows 3. DNA replicates 4. nuclear membrane reforms A 2 only B 2 and 4 only C 2 and 3 only D 1, 3 and 4 only Q amount of DNA R P time

2021 End-of Year-Examination Secondary Three IP 6 Nanyang Girls’ High School IP Biology 13 Which chemical change takes place in green plants but not in animals? A glucose → cellulose B glucose → glycogen C glycogen → cellulose D glycogen → glucose 14 Lactose is a type of disaccharide. Which of the following shows the correct chemical formula for lactose? A (C6H10O5)2 B (C6H12O6)2 C C12H22O11 D C12H24O12 15 An investigation was performed where four equal masses of different foods were burned to heat up a fixed volume of distilled water contained in a boiling tube. The temperature of the water was measured before and after each experiment. The results are recorded in the table below. food initial water temperature / oC final water temperature / oC 1 20 87 2 21 97 3 23 34 4 22 88 Which row shows the most likely order of the food in terms of lipid content? food with least lipid content food with most lipid content A 1 2 3 4 B 2 1 4 3 C 3 4 1 2 D 4 3 2 1

2021 End-of-Year-Examination Secondary Three IP 7 Nanyang Girls’ High School IP Biology [Turn over 16 Which row represents the correct features of a phospholipid molecule? can be modified into glycolipid has glycerol moiety in the structure A   key B    = true C    = false D   17 A peeled, boiled potato strip is placed in a concentrated solution of salt. Which processes will take place? osmosis solute diffusion A   key B    = takes place C    = does not take place D   concentrated solution of salt boiled potato strip

2021 End-of Year-Examination Secondary Three IP 8 Nanyang Girls’ High School IP Biology 18 The diagram shows three routes, 1, 2 and 3, through which substances can pass across a cell surface membrane. Which row correctly shows the routes taken by a water -soluble amino acid and the fat soluble vitamin E? amino acid vitamin E A 1 2 B 1 3 C 2 1 D 3 1 19 According to the ‘lock and key’ hypothesis, what is the ‘lock’ and what is the ‘key’ for the enzyme amylase? ‘lock’ ‘key’ A amylase starch B amylase glucose C glucose amylase D starch amylase 1 2 3

2021 End-of-Year-Examination Secondary Three IP 9 Nanyang Girls’ High School IP Biology [Turn over 20 A student investigated the effect of temperature on an enzyme -catalysed reaction and recorded the results in the table. All other variables were kept constant. temperature / °C rate of reaction / arbitrary units 10 3 20 7 30 16 40 33 50 32 60 14 Which statement correctly explains the results? A At 10 °C, the enzyme molecules are partially denatured. B At 30 °C, bonds are formed between enzyme and substrate molecules. C At 40 °C, the kinetic energy of enzyme molecules is the hig