BIOLOGY FIRST TERM EXAMINATION SS 2

FIRST TERM

SUBJECT: BIOLOGY                     TIME: 1HR 30MINS   CLASS: SS  2

1.Euglena moves by A. whipping action of flagellum  B. beating of its cilia  C. pushing out a jet of water D. beating the pseudopodia and cilia simultaneously.

2.The organelle which eliminates water from the body of protozoa is A. plasma membrane  B. contractile vacuole  C .cell wall D. protoplasm.

3.Which of the following is not present in the nucleus of a cell? A .chromosome B. nucleolus  C. mitochondrion  D. gene

4.In a unicellular organisms, essential nutrients can be transported directly to all part of the body by the process of diffusion only because unicellular organisms have A. a large surface area to volume  B. a large volume to surface area C. permeable cell membrane  D. outer membrane made of cellulose.

The diagram below illustrates the structure o a unicellular organism. Use the question to answer number6-9.

5.What is the name of the organism?  A. amoeba  B. paramecium C. euglena  D.  chlamydomonas

6.What is the biological function of  labeled part III?  A. reproduction  B. osmoregulation  C. locomotion  D. irritability

7.Which of the labeled part does the organism uses for photosynthesis? A. II  B. IV  C.VI  D.V

8.The part labeled V is used for   A. photosynthesis  B. respiration  C. excretion  D .irritability

9..Euglena may be classified as plants because  it   A. has chloroplast B. has a gullet C. lives in water   D. possesses flagellum

10. Which of the cell inclusions can destroy other cell organelles? A. centriole B. ribosome C. lysosome D. mitochondria

11.In which of the following  tissues will osmosis occurs?    A. boiled and peeled yam  B. raw and peeled yam   C. boiled and unpeeled yam   D. roasted and peeled yam

12.Spirogyra is regarded as a multi-cellular plant because   A. the cylindrical cells are linked end to end    B.its  cells are linked together by cytoplasmic strands   C. its cells are large   D. it is an algae containing a large vacuole

13.The name of the enzyme that catalyzes the conversion of glucose to glucose-6-phosphate at the beginning of the glycolysis is   A. phosphate –fructokinase  B. glucose  isomerase  C. hexokinase  D.glucose-6- kina

14.Which of the following organism is  one celled and free- living?   A. volvox  B.spirogyra

C .rhizopus  D. chlamydomonas

15.Which structure in amoeba performs similar function as the kidney in higher animals?  A. cell membrane  B. contractile vacuole  C. cytoplasm  D. food vacuole

16.The function of ribosome in a cell is   A. protein synthesis  B. starch synthesis   C. transport of materials  D. lipid storage

17.The fundamental unit of living organism is the  A. cell  B. organ   C. tissue  D. nucleolus

18.Movement of water across a semi- permeable membrane from a weaker solution to a stronger solution  is known as   A. transpiration  B. diffusion  C. osmosis  D. haemolysis

19.Which of the following organelles is referred to as “suicide bay”?  A. mitochondria   B. lysosome C .golgi body D. ribosome.

20 A spirogyra cell was placed in solution X. After 1 minute it has been  plasmolysed . Solution X was   A. tap water  B. very strong solution  C. a very a weak solution  D. a weak solution

21.Which of the following organisms can exist as a colony?  A. spirogyra  B. amoeba  C. volvox  Paramecium

22.The mode of feeding in green plant is   A. parasitic  B. saprophytic  C .holozoic D.holophytic

23.Mitosis can be observed in all of these except in  A. tip of shoot  B. nail of a man  C. horn of cattle D. sperm cell of man

24. Glycolysis takes place in the A. nucleus B. cytoplasm C. mitochondrion D. endoplasmic reticulum

25.Which of the following does not reproduce by conjugation?  A.paramecium   B.mucor  C .rhizopus  D .amoeba

26.All the following are types of asexual reproduction except  A .conjugation  B. fragmentation  C. fission  D. budding

27.Which of the following processes involves gamete formation? A. binary fission  B.conjugation  C.mitosis  D.meiosis

28.Which of the following is not a cell organelle ?   A.endoplasmic reticulum   B.fat droplet  C.golgi body  D. ribosome

29. Which of the following is not a type of response ? A .chemotropism  B. geotropismg (c) enotropism D.thigmotropism

30.A plant that can commonly undergo vegetative propagation by means of leaves is   A. hibiscus  B bryophylum  C. crotalaria   D. spirogyra.

31.Which of these scientists is not associated with cell theory?   A. Felix Dujardin   B. Mathias Schleiden  C. Micheal   Faraday   D. Robert Hooke.

32.In mammals , fertilization takes place in the   A. ovary  B.oviduct  C.uterus  D.vagina

33.Which of the following stores sperm?  A.cowper”s gland  B. epididymis  C. seminal fluid

1. vas deferens

34.The end product of glycolysis is ………..acid   A. fumaric  B. pyruvic  C. isometric  D.sussinic.

35.Yeast reproduces by a process called   A .binary  fission  B. binary fusion  C. budding  D.conjugation

36.The process that leads to the bursting of red blood cells placed in a  hypotonic solution is called A.cyclosis  B.haemolysis  C. osmosis D. plasmolysis

37.Respiration requiring oxygen is known as  A. oxidation  B.aerobic respiration  C.anaerobic respiration   D .oxidation- reduction respiration

38.All the following are methods of artificial vegetative propagation except  A.cutting   B.use of modified leaves   C.marcotting  D.grafting.

39.The unit contain in a cell structure responsible for a change in form and shape of an organism is called  A.mitochondria  B.gene  C.ribosome  D.lysosome

40.The plant cell mostly stores food as  A. glycogen  B.auxin  C.hormones  D.starch

41.All the following organelles have  membranes except  A .nucleus  B .vacuoles  C. cell membrane  D .cell wall.

42. The cell wall of plants is rigid due to the presence of A.canbium B. cellulose  C. cortex  D. chloroplast

43.The structure responsible for the transportation of materials within the cell is   A. ribosome  B. cell membrane  C .endoplasmic reticulum  D. nucleus

44.Which of these is an anabolic process?  A.digestion  B.respiration   C.decompsition  D. growth.

45.In anaerobic respiration in yeast, the pyruvic acid is converted to  A .ethanoic acid   B. lactic acid C.tri-carbocylic acid  D. ethanol

46.Cellular respiration  occurs in the  A. chloroplast  B. food vacuole  C. mitochondria  D. nucleus

47.In osmosis, when the concentration of the two solutions become equal ,the solution is said to be  A. hypertonic  B .hypotonic  C. isotonic   D. neutral

48.Diffusion can be affected by all of following except  A .concentration gradient  B. size of the molecules  C. temperature  D.colour of the solution

49.In tissue respiration, energy is in form of    A .adenosine diphosphate(ADP)  B. glycogen

1. starch D.adenosine triphosphate(ATP)

50.At what stage of mitosis are the chromosomes drawn to the middle  A .prophase B. anaphase C. metaphase  D.telophase

THEORY; ANSWER 3 QUESTIONS ONLY.

1a.Make a well labeled diagram of a typical plant cell (10-12cm) long to show its external features (4mks).

B .List four ways in which   plant cell and animal cell differ(4mks)

1. State one function each of the following cell organelles  (i) chloroplast  (ii)ribosome   (iii) pyrenoid  (iv) mitochondrion(2mks)

2a.Define (i) osmosis (ii) Diffusion (iii) plasmolysis (3mks)

B .Describe what happens when red blood cells are left for thirty minutes in (I ) distilled water (ii) salt solution with same concentration as the cytoplasmic fluid(3mks)

1. Explain the process of osmosis using a living cell (2mks
2. Explain the following terms (1) tactic response (ii) nastic response (2mks

3a. Explain the following mode of nutrition in plant (i) photosynthesis (ii) chemosynthesis (2mks)

b .Write a chemical equation representing the type of respiration that occurs in the muscles during  a strenuous  exercise (3mk)

ci.Describe an experiment to show the effect of plasmolysis on a fresh filament of spirogyra(2mks)

cii.How can the process be reversed(1mk)

d.. Define the term catabolism and two biological processes that are catabolic  in nature(2mks)

4a.Use chemical equation only to express the process of cellular respiration(2mks)

b .Name the structure in a cell in which ATP is formed(1mk)

1. In tabular form state the differences between aerobic and anaerobic respiration(3mks)
2. Explain alcoholic fermentation (4mks)

5a.Define reproduction (2mks)

(ii) List all forms of asexual reproduction (3mks)

1. Describe the process of sexual reproduction in spirogyra (3mks)
2. Mention two parts of plant where mitosis takes place (2mks).

1.  In which organism is the flame cell found?
2. Which organization is concerned with the conservation of natural resources?
3.  In which organism is the lungbook found?
4. Which scientist is concerned with the modern evolution of mutation?
5. There was a diagram given and the question given was; What is the evidence of evolution in the diagram?
6. The outermost part of mammalian teeth is?
7. The blue green algae belongs to which class? A. Thallophyta B. Man-fluidatophyta C. Monera D. Protista
8. Which of the following is is the female sex cell?
9. Apple is categories as?
10. The definition of adaptation?
11. Structure of animal cell was asked.
12. They asked to label endoplasmic reticulum and mitochondria
13. The excretory organ of planaria.
14. Larmack theory of use and disuse

1. The flame cell is found in flatworms, which are also known as Platyhelminthes. These cells help to regulate the water balance in the organism’s body.
2. The organization concerned with the conservation of natural resources is the World Wildlife Fund (WWF). This organization works to protect endangered species and their habitats, and promotes sustainable practices to help protect the planet’s natural resources.
3. The lungbook is found in spiders. This organ helps the spider breathe and is located in the abdomen.
4. The scientist concerned with the modern evolution of mutation is Richard Dawkins. He is a biologist and author who has written extensively on the topic of evolution and the role of genes in shaping an organism’s traits.
5. The evidence of evolution in a diagram could include a variety of features, such as the presence of similar structures in different organisms, the fossil record, or the presence of genetic similarities between different species.
6. The outermost part of mammalian teeth is the enamel. This hard, protective layer covers the crown of the tooth and helps to prevent damage and decay.
7. Blue-green algae belong to the class Cyanobacteria. These organisms are photosynthetic bacteria that can be found in a variety of environments, from freshwater to marine ecosystems.
8. The female sex cell is the egg or ovum. This cell is produced in the ovaries and is involved in sexual reproduction.
9. Apples are categorized as fruit. More specifically, they are a type of pomaceous fruit, which means that they have a core surrounded by fleshy tissue.
10. Adaptation is the process by which an organism becomes better suited to its environment over time. This can happen through natural selection, in which organisms with certain traits are more likely to survive and reproduce.
11. The structure of an animal cell includes a variety of organelles, such as the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, and lysosomes.
12. The endoplasmic reticulum and mitochondria are both organelles found in animal cells. The endoplasmic reticulum is involved in protein synthesis and lipid metabolism, while mitochondria are responsible for producing energy for the cell.
13. The excretory organ of planaria is called the flame cell. This organ helps to regulate the water balance in the organism’s body and is involved in removing waste products.
14. Lamarck’s theory of use and disuse was a hypothesis proposed by the French biologist Jean-Baptiste Lamarck in the early 19th century. He believed that organisms could acquire new traits during their lifetime based on the way they used or didn’t use certain body parts. This idea was later disproven by scientific evidence showing that genetic information is not passed down in this way

Objectives

1. Which of the following is a type of RNA involved in protein synthesis? A. mRNA B. tRNA C. rRNA D. All of the above
2. Which of the following is a type of cell division that produces four haploid cells? A. Mitosis B. Meiosis C. Binary fission D. Budding
3. Which of the following is NOT a component of a nucleotide? A. Phosphate group B. Nitrogenous base C. Carbohydrate group D. Pentose sugar
4. Which of the following is a function of the respiratory system? A. Transporting oxygen to cells B. Removing waste products from cells C. Regulating body temperature D. Breaking down food into nutrients
5. Which of the following is NOT a type of tissue found in the human body? A. Epithelial tissue B. Connective tissue C. Muscular tissue D. Digestive tissue
6. Which of the following is a type of muscle tissue that is involuntary and found in the walls of internal organs? A. Skeletal muscle B. Smooth muscle C. Cardiac muscle D. Striated muscle
7. Which of the following is a type of symbiotic relationship in which one organism benefits and the other is unaffected? A. Parasitism B. Mutualism C. Commensalism D. Competition
8. Which of the following is a hormone that regulates blood sugar levels in the body? A. Insulin B. Glucagon C. Thyroxine D. Estrogen
9. Which of the following is a type of genetic mutation that involves the addition or deletion of a nucleotide in DNA? A. Substitution B. Frameshift C. Duplication D. Inversion
10. Which of the following is a process that involves the movement of water molecules from an area of high concentration to an area of low concentration? A. Diffusion B. Osmosis C. Active transport D. Endocytosis
11. In which organism is the flame cell found? A. Earthworm B. Starfish C. Flatworm D. Jellyfish
12. Which organization is concerned with the conservation of natural resources? A. Greenpeace B. World Wildlife Fund C. Red Cross D. Doctors Without Borders
13. In which organism is the lungbook found? A. Frog B. Fish C. Snake D. Spider
14. Which scientist is concerned with the modern evolution of mutation? A. Charles Darwin B. Gregor Mendel C. Richard Dawkins D. Louis Pasteur
15. There was a diagram given and the question given was; What is the evidence of evolution in the diagram? A. Fossil record B. Genetic similarities C. Similar structures D. All of the above
16. The outermost part of mammalian teeth is? A. Pulp B. Dentine C. Enamel D. Cementum
17. The blue-green algae belongs to which class? A. Thallophyta B. Man-fluidatophyta C. Monera D. Protista
18. The blue-green algae belongs to which class? A. Thallophyta B. Man-fluidatophyta C. Monera D. Protista
19. Which of the following is is the female sex cell? A. Sperm B. Ovum C. Zygote D. Embryo
20. Apple is categorized as? A. Vegetable B. Fruit C. Legume D. Cereal
21. The definition of adaptation? A. The process of converting light energy into chemical energy B. The process of breaking down food into usable energy C. The process of becoming better suited to one’s environment over time D. The process of sexual reproduction in plants
22. Structure of animal cell was asked. A. Cell wall, nucleus, mitochondria, chloroplast B. Cell membrane, nucleus, mitochondria, endoplasmic reticulum C. Cell membrane, nucleus, ribosomes, lysosomes D. Cell wall, nucleus, mitochondria, ribosomes
23. They asked to label endoplasmic reticulum and mitochondria. A. ER and MT B. EN and MY C. RE and TM D. ME and RT
24. The excretory organ of planaria. A. Flame cell B. Nephridia C. Malpighian tubules D. Kidneys
25. Lamarck’s theory of use and disuse A. Organisms can acquire new traits based on how they use or don’t use certain body parts B. Organisms adapt to their environment through natural selection C. All species descended from a common ancestor D. Genetic information is not passed down from parent to offspring