Jiujiang No.1 Middle School last semester biology final examination paper?

First, multiple-choice questions (each question has only one best option, each question 1 point, *** 50 points) multiple-choice questions (each question has only one best option, each question 1 point,

1.SARS is a serious infectious disease caused by coronavirus. In 2003, we went through the process of fighting against it. The following statement about SARS is wrong (). A: The SARS virus can only survive by cells. B.SARS virus can be metabolized and spread in the air, not just through cells. C.SARS virus mainly causes disease by invading and destroying lung cells. D.SARS virus can only multiply in living cells. On Lushan Mountain, cypress lives with pine trees, wild animals, microorganisms and other creatures. These creatures constitute (). A. Community B. Population C. Ecosystem D. Biosphere

A piece of rotten wood, covered with moss and lichen, is still alive in the rain accumulated in the hole of rotten wood, and there are mice and spiders in the hole of the tree. Among the following items, the "life system level" of this rotten wood is equivalent to () A. All pests in a rice field C. All creatures in a pine forest 4. The structure of plant cells is () A. Centrosome B. Chloroplast C. Macrovacuole D. Cell wall B. All carp in a pond D. A vibrant greenhouse.

5. Among the following groups of biological cells, () A. Escherichia coli and yeast C. Tuberculosis and pneumococcus B. Green algae and cyanobacteria D. Wheat and mushrooms.

6. When observing the epidermal cells of purple onions and phosphorus slices, if it is found that the lower part of the field of vision is dark and the upper part is bright, you should adjust () A. Eyepiece B. Objective C. Reflector D. Aperture.

7. The following description about using high-power lens is wrong: (a) Brighten the field of vision, and the image will be clear; (c) The number of cells observed under high magnification will decrease; (b) Adjust the coarse focus screw first, and then adjust the fine focus screw; (d) Observe clearly under the low-power lens, and then replace the high-power lens.

8. The cactus growing in the desert contains () a. protein b. sugar c. lipid d. water.

9. The following substances all contain a set of N elements () A. RNA and fat B. Sugar and protein C. Enzyme and DNA D. Fat and sugar.

10. Human hemoglobin contains Fe2+ ions. If you eat nitrite by mistake, people will be poisoned, because nitrite will change Fe2+ ions into Fe3+ ions, generate methemoglobin, and make hemoglobin lose its ability to combine with O2. The use of vitamin C can reduce nitrite poisoning, which shows that vitamin C has () A. Acidity B. Alkalinity C. Oxidation D. Reducibility.

1 1. When biuret reagent is added to amylase solution, the result should be () A. The solution is blue B. Brick red precipitate appears C. The solution is purple D. The solution is orange.

12. The basic elements of life include () a. C. C. C, H, O, nb.c, H, O, N, P, sd.zn, cl, Cu, Mo, and there must be C in iron cells. The types of chemical elements in different cells are roughly the same. D the content of different elements in different cells of multicellular organisms may also be different. 14. The following statement is true: () A. Watermelon juice is a good biological tissue sample in the experiment of identifying soluble reducing sugar. B. In the experiment of observing mitochondria, human oral epithelial cells should be killed with hydrochloric acid first. In order to facilitate janus green to enter C, the peanut cotyledons can be dyed orange with biuret reagent D, and the distribution of DNA and RNA in eukaryotic cells can be displayed by staining cells with methyl green pyrrole red dye 15. It is known that the R group of methionine is -CH2-CH2-S-CH3, and the molecular formula of methionine is () A. C5H 1 1O20.

16. How many tripeptides are there composed of methionine, serine and alanine () a.3b.4c.5d.6?

17. The genetic material of rice and phage contains () A.5, 5B.4, 4C.4, 5D.5 and 4 bases respectively.

18. The Chinese name of the base contained in DNA but not in RNA is () A. uracil B. thymine C. guanine D. adenine.

19. Compared with sugar, fat () A contains more C and H, and oxidative decomposition provides more energy. C contains less C and H, and oxidative decomposition provides more energy. 20. The common polysaccharides in animal cells are () A. Glycogen B. Starch C. Cellulose D. Peptidoglycan B. It contains more C and H, and oxidative decomposition provides less energy.

2 1. Winter comes and the dead leaves wither. Most plant cells () A. Bound water decreases and cold resistance increases. B. the combined water decreases and the cold resistance decreases. C. with the increase of bound water, the cold resistance decreases. D. the increase of bound water increases the cold resistance. 22. Manganese ions are activators of many enzymes. For example, they can activate nitrate reductase, but plants lacking manganese ions cannot use nitrate reductase. This shows that inorganic ion () A plays an important role in maintaining acid-base balance. C. It plays an important role in regulating intracellular osmotic pressure. B. It plays an important role in maintaining cell morphology. D. It plays an important role in maintaining life activities in organisms.

23. About the description of mature red blood cells in mammals, the mistakes are that (a) they can be used to prepare cell membranes; (c) They can be put into clean water to absorb water and burst; (b) The cell contains no nucleus; (d) They can be used for aerobic respiration.

24. On the cell membrane, most substances related to recognition are () A, phospholipid B, cellulose C, glycoprotein D and nucleic acid.

25. The organelles known as protein's "synthesis machine" are () A. Mitochondria B. Ribosomes C. Chloroplasts D. Endoplasmic reticulum.

26. Among the following items, the structures with double membranes are () A. Golgi apparatus and endoplasmic reticulum B. Centrosome and ribosome C. Chloroplast and mitochondria D. Vacuole and lysosome 27. The following statements are incorrect: () A. Bird flying muscle cells contain more mitochondria. C. The synthesis of secreted proteins needs respiration to provide energy. 28. In eukaryotic cells, the main place to store genetic material is () a..

29. The structures related to nuclear material exchange are () A. Chromosome B. Nucleolar C. Nuclear membrane D. Nuclear pore.

30. The pathological changes of organelles often cause some diseases. What kind of organelles are related to silicosis? () A. Mitochondria B. Lysosome C. Endoplasmic reticulum D. Golgi apparatus.

3 1. In the experiment of plasma wall separation and plasma wall separation and recovery, after plasma wall separation of onion epidermal cells, the liquid between cell wall and protoplasm layer is () A, sucrose solution B, cell night C, clear water D and cytoplasm.

32. The following materials were selected for plasma wall separation experiments. The obvious separation phenomena are: (a) dry seeds of plants; B) mature mesophyll cells; C) root meristem cells; D) catheter element.

33. The statement about active transportation is wrong: (a) It needs a carrier B. It must be an inverse concentration gradient C. It may be a parallel concentration gradient D. It needs cell energy.

34. Fatty acids enter and leave cells in the same way () A. Immunoglobulin B. Inorganic salt ion C. Sex hormone D. Glucose.

35. The picture below can reflect the auxiliary diffusion process is ().

36. Regarding the fluid mosaic model of biofilm, the correct statement is: (a) Phospholipids are arranged in a monolayer. C phospholipid molecules and most protein molecules in the membrane can move. B. The protein in the membrane is arranged symmetrically. Polysaccharide is located on the inner surface of cell membrane.

37. After a certain toxin was known to act on plant cells, it was found that the intracellular transport capacity of potassium ions was greatly weakened, but it did not affect the transport of magnesium ions and calcium ions. Then this toxin is likely to (a) inhibit the respiration of cells C. inhibit the activity of K+ carriers B. inhibit the progress of photosynthesis D. kill plant cells.

The following examples can illustrate the fluidity of biofilm: (a) the cell membrane allows some small molecules, ions and other substances to enter and leave the cell; (c) Water molecules enter and leave the cell through free diffusion; (b) phagocytosis of pathogenic bacteria by leukocytes; (d) Glucose enters red blood cells.

39. The dialysis bag is a semi-permeable membrane that allows water molecules and glucose molecules to pass through. Now tie the dialysis bag with a certain concentration of glucose solution tightly and soak it in distilled water. The following four numbers can correctly display the time and the glucose concentration in the dialysis bag ().

40. The following figure is a schematic diagram of a plant cell after separation of the protoplasm wall, and the protoplasm layer is ().

A. 1，2，3b.2，3，4c.3，4，5d. 1，3，5，465，438+0。 The statement about enzymes is correct: (a) Enzymes are produced by living cells. An organic substance that can only catalyze cells. B. Enzymes can only catalyze under high temperature and high pressure. C. Enzymes can speed up the chemical reaction because they can greatly reduce the activation energy of the reaction. D. All enzymes have digestive function. 42. A salivary amylase can hydrolyze one million starches into maltose, but it can't catalyze a lipolysis, indicating that the enzyme has () A. high efficiency, specificity C. high efficiency, diversity B. specificity, diversity.

43. In the case of a certain amount of enzyme, the following figure can correctly express the relationship between reactant concentration and chemical reaction rate ().

44. Enzymes can be divided into extracellular enzymes and intracellular enzymes according to their positions in organisms. The following enzymes belong to extracellular enzymes: () A. Salivary amylase B. Respiratory enzyme C. RNA polymerase D. ATP synthase.

45. Put salivary amylase into water at 100℃ for 30 minutes, and then put it into a test tube with starch solution at 37℃. After a while, drop two drops of iodine into the test tube. Results and cause analysis were correct: (a) There was no blue color, and salivary amylase resumed its activity at 37℃. B) Blue, salivary amylase at 65438. The molecular structure changed and the enzyme lost its activity. C. Blue appeared, and salivary amylase was decomposed at 100℃ and lost its activity. D there is no blue color, and the activity of salivary amylase is not affected by temperature. 46. Regarding the design of biological experiments, it is wrong to say () a. It is generally necessary to design the control group. B. In a controlled experiment, generally only one variable can be changed. C. Generally, the biological experiment only needs to be done once, and there is no need to repeat the experiment. D. The selection of experimental materials should not only pay attention to the effect, but also consider factors such as economic convenience. 47. After studying biology for a semester, everyone thinks that scientists can succeed because they () ① used scientific and correct methods and advanced technology. A person works hard in the laboratory. A. 123B.234② Perseverance.

48. Regarding the narrative of cell theory, it is wrong to think that (a) Schleiden and Wang Shi are the main founders; (c) old cells produce new cells; (b) It reveals that all living things are made up of cells; (d) A cell is a relatively independent unit.

49. The important elements contained in thyroid hormone, hemoglobin and chlorophyll are () a.i, Fe, Mg C.I, Mg, feb.cu, Mg, i.d.fe, Mg, i.

50. As we all know, the influence of pH value on the catalysis of pepsin and trypsin is shown in the following figure. Now, pepsin, trypsin protease solution and a small amount of ground lean meat foam are simultaneously added into a test tube with a pH of 3.0 and a temperature of 37℃. After a period of reaction, the mixture in the test tube is most likely () A. pepsin, trypsin, short peptide B. pepsin, short peptide C. trypsin, short peptide D. short peptide.

2. Fill in the blanks (no time 1, * * 32) 5 1. Fill in the blanks in the table with the determined ingredients, reagents used and colors presented. Identification components: reducing sugar, DNA, mitochondria, protein, RNA, fat and starch. Used reagents: biuret reagent, Linfei reagent, iodine solution, Sudan III, methyl green, Janus green and pyrrole red. Identify the colors of components: blue, turquoise, green, brick red, purple, red and orange. The reagent for reducing sugar Sudan III blue-green DNA pyrrole red starch biuret is blue-green.

52. The picture on the right is a schematic diagram of the cell submicroscopic structure of organisms. According to the diagram, the main component of [2] in (1) is the organelle related to its formation. [(2) The main component of [1] in the diagram is its structural characteristics. ] , 。 ,

(3) If the cell is the red pulp cell of watermelon, the pigment mainly exists in []. If the cell is the root tip cell of onion, it should not be in the picture. ] supply. .

Structure with []

(4) The energy required for cell life activities is mainly composed of [

(5) If the cell is a lower plant cell, the organelles that should appear in the figure are (6) The organelles with double membrane structure in the cell in the figure are [] and [].

(7) If the cell is a higher animal cell, the structure it should not have is [].

、 [ ]

And [

]

Third, the experimental questions (12 points) 53. It is known that saliva contains amylase, which can catalyze starch hydrolysis; I also know that eggs will mature when heated to 65℃, but I don't know whether salivary amylase will affect its biological activity when heated to 65℃. In order to discuss this problem, please design the corresponding experimental scheme according to the given materials and supplies, and predict the possible experimental results and the corresponding conclusions that can be obtained. Materials and supplies: diluted saliva, diluted starch paste (one stored at 37℃ and the other at 65℃), iodine solution, water bath pot, several test tubes, measuring cylinder, dropper, beaker and thermometer. Experimental scheme: (1) Take three test tubes, label them as A, B and C respectively, inject 3 mL of starch paste and 2 mL of distilled water stored in warm water at 37℃ into test tube A, and shake well; Adding into test tube b; Add it to the c test tube. (4) (2) Put test tubes A and C into warm water of about 37℃, and put test tube B into warm water of 65℃. All three test tubes were incubated for 5 minutes and then taken out. (3) 。 (2) Prediction of experimental results and corresponding conclusions: (1) If the colors of test tube liquids B and C are the same (both are colorless), it is proved; (2) (2) If the liquid in test tube B treated at 65℃ is blue, which is the same color as the liquid in test tube A, it is proved; (2) (3) If the liquid in test tube B treated at 65℃ is blue, but lighter than the liquid in test tube C, it is proved. ) (2 4. Calculation questions (6 points) 54. Peptide 4 15g was hydrolyzed by peptidase to obtain 505g amino acid. The analysis shows that the average relative molecular weight of amino acids constituting the polypeptide is 100, and the polypeptide contains amino acids such as glycine, alanine and cysteine (the structural formulas of the three amino acids are shown in the following figure), and each mole of the polypeptide contains S element 5 1 mole.

Please calculate: (1) How many amino acids does a molecule of this polypeptide consist of? (2) If this polypeptide is only formed by dehydration and condensation of these three amino acids, what is their quantitative ratio? (3) If there is lysine in this polypeptide, what is the minimum number of N atoms in a molecule of this polypeptide? (Hint: there is an amino group on the R group of lysine)

13. Regarding the elements in cells and inorganic nature, the following statements are wrong: () A. There are elements in cells, and there must be elements in inorganic nature. B. Inorganic nature has elements and is fine.