Biology objective questions (Structure & Functions) | Quiz: Biology General Knowledge Questions

1 >>Chlorophyll “a” occurs in all Photosynthetic plants except: ?

(A) Green algae
(B) Blue green algae
(C) Angiosperms
(D) Pigment containing bacteria

2 >>When the fluid outside a cell has a greater concentration of a given molecule than the fluid inside the cell, the external fluid is ?

(A) isotonic
(B) hypertonic
(C) hypotonic
(D) ultratonic

3 >>The osmotic pressure of pure water is: ?

(A) 0
(B) 1
(C) 10
(D) 100

4 >>The water potential of all solutions as compared to pure water is always: ?

(A) higher
(B) lower
(C) equal
(D) none of these

5 >>The wavelengths of visible light are longer than the wavelengths of ?

(A) infrared
(B) ultraviolet
(C) microwaves
(D) radio waves

6 >>The wavelengths of visible light are shorter than the wavelengths of ?

(A) infrared
(B) ultraviolet
(C) x-rays
(D) gamma rays

7 >>Which of the following colours of light work best for photosynthesis? ?

(A) Red
(B) Yellow
(C) Blue
(D) Both a and c

8 >>Which of the following is the worlds most common protein? ?

(A) cellulose
(B) ribulose biphosphate carboxylase
(C) insulin
(D) diastase

9 >>Photophosphorrylation in a chloroplast is mot similar to which of the following mitochondrial reaction? ?

(A) substrate-level phosphorylation
(B) oxidative phosphorylation
(C) oxidative decarboxylation
(D) hydrolysis

10 >>A photosystem is an assemblage of pigment molecules together ranging from ?

(A) 10 – 100
(B) 100 – 200
(C) 200 – 400
(D) 400 – 500

11 >>The final acceptor of electrons during the light reaction of photosynthesis is: ?

(A) Cyt. F
(B) Cyt. B
(C) ATP
(D) NADP

12 >>Which of the following is obtained from phosphoglyceraldehyde in the dark reaction of photosynthesis? ?

(A) phosphoglyceric acid
(B) glucose
(C) carbon dioxide
(D) plastoquinone

13 >>Which of the following conditions in a plant cell would increase the uptake of water? ?

(A) osmotic pressure is higher than the turgor pressure
(B) osmotic pressure is equal to turgor pressure
(C) osmotic pressure is less than the turgor pressure
(D) both a and c

14 >>Which of the following would occur when a plant cell is packed in a fluid with high osmotic concentration than the cell sap? ?

(A) imbibition
(B) Plasmolysis
(C) Deplasmolysis
(D) Diffusion

15 >>With the increase of ions in the xylem its water potential becomes ?

(A) more positive
(B) more negative
(C) zero
(D) neutral

16 >>Water potential of a liquid increases when solute concentration ?

(A) Increases
(B) Decreases
(C) Remains unchanged
(D) None of these

17 >>Which of the following is not true of the exudation of water? ?

(A) water drops come out through stomata
(B) water drops come out through hydathodes
(C) water is forced out of the leaves by root pressu
(D) water drops are not formed by dew

18 >>Water in the xylem vessel will ascend up until ?

(A) its cohesive and adhesive strength is more than the gravitational pull
(B) gravitational pull is higher then the cohesive and adhesive strength of water
(C) sufficient water is available in the soil
(D) it is used in the photosynthesis

19 >>Plants do not store carbohydrates as glucose because it ?

(A) dissolves in water, thereby altering the osmotic bala
(B) attracts insects herbivores
(C) is an unstable molecule
(D) would replace ribose in DNA synthesis

20 >>Which of the following processes is responsible for the entry of water into root hair? ?

(A) wall pressure
(B) osmotic pressure
(C) turgor pressure
(D) atmospheric pressure

21 >>Which of the following forces are responsible for the ascent of water in plant body? ?

(A) atmospheric pressure
(B) root pressure
(C) transpiration pull
(D) both b and c

22 >>Of the total sunlight reaching the earth, the percentage used in the photosynthesis is: ?

(A) 0.02
(B) 0.2
(C) 0.3
(D) 0.5

23 >>Which of the following products of light reaction of photosynthesis is not used in the dark reaction? ?

(A) ATP
(B) NADPH2
(C) Oxygen
(D) None of these

24 >>The empirical formula of chlorophyll a is: ?

(A) C55 H72 O5 N4 Mg
(B) C55 H70 O5 N3 Mg
(C) C56 H72 O66 N4 Mg
(D) C55 H74 O5 N5 Mg

25 >>Which of the following is true of chlorophyll? ?

(A) absorbs all types of waves of sunlight
(B) containing iron atom in the center
(C) containing magnesium atom in the center
(D) present in all cells of green plants

26 >>The most effective light absorbed by the chlorophyll is: ?

(A) yellow
(B) orange
(C) green
(D) none of these

27 >>Photosystem I has an absorption spectrum of wavelengths of around ?

(A) 600 nm
(B) 650 nm
(C) 680 nm
(D) 700 nm

28 >>Which of the following is not necessary for photosynthesis? ?

(A) CO2
(B) Chlorophyll
(C) H2O
(D) Oxygen

29 >>In photosystem II, the electrons lost by reaction center are replaced by electrons from ?

(A) H2O
(B) C2 O
(C) Photosystem I
(D) ATP

30 >>In animals the product of anaerobic respiration is: ?

(A) Butyric acid
(B) Alcohol
(C) Glucose
(D) Lactic acid

31 >>The process of Glycolysis takes place in: ?

(A) Mitochondria
(B) Cytoplasm
(C) Stroma
(D) Granum

32 >>In electron transport chain, one pair of electrons passing from NADreduced to oxygen produces ?

(A) 4 ATP
(B) 3 ATP
(C) 2 ATP
(D) 1 ATP

33 >>From which of the following plants gain weight? ?

(A) Respiration
(B) Transpiration
(C) Photosynthesis
(D) Fermentation

34 >>Cambium is responsible for increase in: ?

(A) Length
(B) Photosynthesis
(C) Diameter
(D) Transpiration

35 >>In which of the following cells elongate parallel to the long axis of the stem or root? ?

(A) Pith
(B) Trachieds
(C) Cortex
(D) Parenchyma

36 >>Spiral thickenings of the walls of cells occur in: ?

(A) Parenchyma
(B) Chlorenchyma
(C) Xylem vessels
(D) Cortex

37 >>The molecule which actually enters the Krebs cycle is: ?

(A) Pyruvic acid
(B) Acetyl-CoA
(C) Oxao acetic acid
(D) Fumaric acid

38 >>In the Krebs cycle oxaloacetic acid reacts with: ?

(A) Pyruvic acid
(B) Citric acid
(C) Acetyl-CoA
(D) Succinic acid

39 >>One ATP molecule is generated during the Krebs cycle in the step: ?

(A) citric acid ----------- Alpha Ketoglutatic acid
(B) Alpha Ketoglutatic acid ------- Succinic acid
(C) Succinic acid ---------------- Fumaric acid
(D) Fumaric acid----------- Malic acid

40 >>It involves the liberation of Oxygen and absorbtion of CO2 ?

(A) Aerobic respiration
(B) Anaerobic respiration
(C) Photosynthesis
(D) Both A & B

41 >>At the end of the electron transport chain during respiration, electrons are accepted by: ?

(A) NAD
(B) FAD
(C) Oxygen
(D) Hydrogen

42 >>During growth fibers elongate greatly: ?

(A) At right angle to the long axis
(B) Parallel to the long axis
(C) Obliquely to the long axis
(D) In all directions

43 >>Which of these is the naturally occurring auxins? ?

(A) Indole acetic acid
(B) 2, 4-D
(C) Abscisic acid
(D) Butyric acid

44 >>The application of Auxin in small amount: ?

(A) Stimulate the growth of leaves
(B) Retard the growth of leaves
(C) Suppress the growth of leaves
(D) Does not affect the growth of laves

45 >>Which of these increases the growth rate of isolated cells in a test tube? ?

(A) Auxins
(B) Cytokinins
(C) Gibberellins
(D) None of these

46 >>Chrysanthemum indicum is a: ?

(A) Short day plant
(B) Long day plant
(C) Day neutral plant
(D) Both A & B

47 >>Thigmotropism is a growth movement in response to: ?

(A) sunlight
(B) gravity
(C) water
(D) touch

48 >>Which one of the following properties are shared by photosynthesis and aerobic respiration? ?

(A) CO2 consumption
(B) ATP synthesis
(C) O2 release
(D) Glucose synthesis

49 >>The function of cellular respiration is to ?

(A) make ATP
(B) make NADPH
(C) get rid of glucose
(D) get rid of carbon dioxide

50 >>Each chemical reaction in cellular respiration requires ?

(A) a molecule of ATP
(B) a molecule of FAD
(C) a molecule of NAD
(D) a specific enzyme

51 >>The term anaerobic means ?

(A) with glucose
(B) with oxygen
(C) without glucose
(D) without oxygen

52 >>Which of the following processes makes direct use of oxygen? ?

(A) Glycolysis
(B) Fermentation
(C) Electron transport chain
(D) Krebs cycle

53 >>How many ATP molecules are formed during one turn of Kreb’s cycle? ?

(A) zero
(B) 1
(C) 2
(D) 3

54 >>Glycolysis is a process found in ?

(A) only eukaryotic cells
(B) only prokaryotic cells
(C) only most muscle cells
(D) virtually all cells

55 >>How many molecules of oxygen gas are used during the Glycolysis of one glucose molecule? ?

(A) non
(B) 1
(C) 6
(D) 38

56 >>Phosphoglyceraldehyde is oxidized during Glycolysis. What happens to the hydrogen atoms that are removed during this oxidation? ?

(A) They oxidize NAD
(B) They reduce NAD
(C) They are transferred to Pyruvic acid
(D) They are eliminated in the form of methane

57 >>During the first step of Glycolysis, glucose is converted to glucose phosphate. The phosphate group comes from ?

(A) inorganic phosphate
(B) phospholipids of the membrane
(C) ADP
(D) ATP

58 >>Which of the following is not true of Glycolysis? ?

(A) substrate level phosphorylation takes place
(B) the end products are carbon dioxide and water
(C) ATP is formed
(D) ATP is used

59 >>Which of the following is not formed during alcohol fermentation? ?

(A) acetyl coenzyme A
(B) Pyruvic acid
(C) Ethanol
(D) Carbon dioxide

60 >>Which of the following is the end product of anaerobic respiration in animals? ?

(A) ethyl alcohol
(B) lactic acid
(C) carbon dioxide
(D) water

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Biology objective questions (Structure & Functions) | Quiz: Biology General Knowledge Questions