Biology Quizzes Stage-3

Here you’ll find the most important and repeated Biology past paper questions Quizzes Stage-3. A perfect way to prepare for top competitive exams and score maximum marks. Good Luck

Total Quizzes: 50
Total Marks: 50
Total Questions: 50
Time Allowed: 30 minutes
The correct answers will be displayed after the test is completed.

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Result

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#1. In an oxidation process 14135KJ energy is release, how many moles of glucose consume during this process?

#2. All are factors affecting enzyme activity except?

Substrate concentration

Organic solvent

All

#3. Deficiency of dietary protein, causes an imbalance in the gastro-intestinal system?

Marasmus

Kwashiorkor

Diarrhea

All

#4. Trace the correct pathway of protein produce from protein factories?

RER → Ribosome → Golgi body → Lysosome

Ribosomes → RER → Golgi body → Lysosome

RER → Ribosome → Lysosome → Golgi body

All

#5. All are characters of enzymes except?

Enzyme speed up a biochemical reaction

Enzyme activity enhanced by inhibitors

Enzymes are sensitive to minor change in pH

None

#6. What is a function of the rough endoplasmic reticulum?

Aerobic respiration

Intracellular digestion

Synthesis of protein

All

#7. Which process occurs during prophase of mitosis in an animal cell?

Division of centromeres

Formation of chromosomes

Separation of centrioles

Both B & C

#8. What is responsible for the high resolution of the electron microscope?

High magnification

Short wavelength of the electron beam

Use of heavy metals strains

All

#9. Which statement about the fluid mosaic model of membrane structure is correct?

The lower the temperature, more fluid nature

Higher the temperature, less fluid nature

The less unsaturated the fatty acid, the more fluid nature

The more unsaturated the fatty acid, the more fluid nature

All

#10. Human plasma proteins include which of the following?

Fibrinogen

Haemoglobin

Albumin

Both A and C

Only C

#11. Which process allow movement in and out of cell?

Osmosis

Diffusion

Active transport

All of these

None above

#12. Light dependent reaction takes place in ______?

Stroma

Thylakoid

Cristae

None

#13. Reaction in which solar energy is transferred to glucose from ATP and NADPH2, takes place in stroma called?

Light reaction

Dark reaction

Light dependent reaction

none

#14. Deficiency of Vitamin-K cause?

Rickets

Anemia

Scurvy

None

#15. Which one of the following is mismatched?

Proteases → Carbohydrate

Lipases → Lipids

Trypsin → Protein

None

#16. Each mole of ATP store energy?

7.3 kcal/mole

17.3kcal/mole

17.3kj/mole

All

#17. Splitting of water in presence of light called?

Hydrolysis

Glycolysis

Photolysis

None

#18. Loss of electron and proton is called?

Reduction reaction

Redox reaction

Oxidation reaction

none

#19. Select the odd one of the followings?

Active transport

Facilitated diffusion

Diffusion

All

#20. Sequence of physiological changes by which cell commit suicide?

Apoptosis

Autophagy

Necrosis

Both A and B

None

#21. A type of cell division in which spore mother cell produce spores?

Amitosis

Mitosis

Meiosis

All

#22. Metabolic reactions are _______?

Constructive reactions

Destructive reactions

Inhibiting reactions

Both A and B

none above

#23. Fundamental molecule produced during photosynthesis is ______?

Glucose

Amino acid

Nucleotide

none

#24. Rate of reaction will increase when temperature ______?

Increases

Decreases

Below 10°C

Both A and B

#25. Phenomenon in which pair of homologous chromosome fails to separate called?

Non-disjunction

Terminalization

Synapsis

None

#26. Period of rapid growth and development called?

Childhood

Adolescence

Adult hood

None

#27. All are sources of calcium except?

Red meat

Green leafy vegetables

Broccoli

None

#28. What regulates the flow of water through the xylem?

Passive transport by the endodermis

The evaporation of water from the leaves

Active transport by sieve-tube membrane

none

#29. Which of the following is true of bile salts?

They are enzymes

They are manufactured by the pancreas

They emulsify fats in the duodenum

They increase the efficiency of pepsin action

#30. Phloem transport of sucrose can be described as going from “source to sink” which of the following would not normally function as a sink?

Mature leaf

Storage organ

Growing root

none

#31. Cell organelle found in animal cell and help intracellular digestion?

Mitochondria

Lysosome

Golgi apparatus

All

#32. In human digestive system trachea and oesophagus both connect to the _____?

Large intestine

Stomach

Pharynx

None

#33. Secondary wall is made up of ______?

Pectin and cellulose

Cellulose and lignin

Lignin and pectin

All

#34. Which of the following is mismatched?

Anaphase → Chromatids move

Telophase → Nuclear membrane disappear

Prophase → Centriole move

All

#35. Select the mismatched one of the followings?

Plastids → Storage of chemicals

Ribosomes → Synthesis of steroids

Mitochondria → Synthesis of ATP

All

#36. Choose the correct statement regarding lock and key model?

Enzyme and substrate posses' specific complementary geometric shapes

Active site of enzyme is flexible

Active site continuously changes

All above statements are correct

All above statements are incorrect

#37. Active site continuously changes it shapes until the substrate do not bind to it, is statement of ______?

Induce fit model

Lock and key model

Fluid mosaic model

None

#38. Which of the following statements describes pepsin?

It is manufactured by the pancreas

It helps stabilize fat-water emulsions

It begins the hydrolysis of proteins in the stomach

All

#39. In a process of cellular respiration 180 ATP molecules are produced, how many moles of glucose consume during this process?

#40. Splitting of glucose (glycolysis) release small amount of energy which is enough to generate _____?

2 ATP

5 ATP

18 ATP

None

#41. Which of the following vitamins is correctly associated with its use?

Vitamin K → Production of white blood cells

Vitamin E → Protection of skin from cancer

Vitamin A → Incorporated into the visual pigment of the eye

All

#42. The movement of organic materials (food) take place through ______?

Xylem

Tracheid

Phloem

All

#43. Stage of meiosis in which centromeres shorten and the paired chromatids are pulled away from one another?

Anaphase-II

Metaphase-II

Telophase-II

Prophase-II

All

#44. Chemical reaction requires particular conditions to carry down at proper rate, especially?

Temperature and Nature

Nature and Pressure

Temperature and Pressure

None

#45. Choose the incorrect statement regarding meiosis?

Takes place in germ cell to produce gametes

Production of new somatic cells from germ cells

Reduces the diploid number of chromosomes to half

All

#46. An animal that migrates great distances would obtain the greatest benefit from storing its energy as ____?

Fats

Carbohydrates

Protein

All

#47. The point where the enzyme is most active is known as ______?

Neutral pH

Acidic pH

Optimum pH

Basic pH

None

#48. Select one the mismatched?

Protein → Amino acid

Carbohydrate → Glucose

Fats → Starch

None

#49. What occurs in metaphase of mitosis?

Chromosome line up on the equator of the cell

Chromatids reach the poles of the spindle

Chromatids separate and move to opposite poles

All

#50. Stage of mitosis in which chromatids reach the poles and their movement ceases?

Prophase

Metaphase

Anaphase

Telophase

All

Finish

2 Comments

Balqes says:

April 14, 2026 at 4:55 pm

Good 👍

Reply
Balqes says:

April 14, 2026 at 4:56 pm

Mashallah great 👌

Reply

Here you’ll find the most important and repeated Biology past paper questions Quizzes Stage-3. A perfect way to prepare for top competitive exams and score maximum marks. Good Luck

Total Quizzes: 50

Total Marks: 50

Total Questions: 50

Time Allowed: 30 minutes

The correct answers will be displayed after the test is completed.

Result

Congratulations! You shine because you dared to work hard when it was tough. Keep glowing!

Fail! No worries — rise, revise, and return stronger!

#1. In an oxidation process 14135KJ energy is release, how many moles of glucose consume during this process?

#2. All are factors affecting enzyme activity except?

#3. Deficiency of dietary protein, causes an imbalance in the gastro-intestinal system?

#4. Trace the correct pathway of protein produce from protein factories?

#5. All are characters of enzymes except?

#6. What is a function of the rough endoplasmic reticulum?

#7. Which process occurs during prophase of mitosis in an animal cell?

#8. What is responsible for the high resolution of the electron microscope?

#9. Which statement about the fluid mosaic model of membrane structure is correct?

#10. Human plasma proteins include which of the following?

#11. Which process allow movement in and out of cell?

#12. Light dependent reaction takes place in ______?

#13. Reaction in which solar energy is transferred to glucose from ATP and NADPH2, takes place in stroma called?

#14. Deficiency of Vitamin-K cause?

#15. Which one of the following is mismatched?

#16. Each mole of ATP store energy?

#17. Splitting of water in presence of light called?

#18. Loss of electron and proton is called?

#19. Select the odd one of the followings?

#20. Sequence of physiological changes by which cell commit suicide?

#21. A type of cell division in which spore mother cell produce spores?

#22. Metabolic reactions are _______?

#23. Fundamental molecule produced during photosynthesis is ______?

#24. Rate of reaction will increase when temperature ______?

#25. Phenomenon in which pair of homologous chromosome fails to separate called?

#26. Period of rapid growth and development called?

#27. All are sources of calcium except?

#28. What regulates the flow of water through the xylem?

#29. Which of the following is true of bile salts?

#30. Phloem transport of sucrose can be described as going from “source to sink” which of the following would not normally function as a sink?

#31. Cell organelle found in animal cell and help intracellular digestion?

#32. In human digestive system trachea and oesophagus both connect to the _____?

#33. Secondary wall is made up of ______?

#34. Which of the following is mismatched?

#35. Select the mismatched one of the followings?

#36. Choose the correct statement regarding lock and key model?

#37. Active site continuously changes it shapes until the substrate do not bind to it, is statement of ______?

#38. Which of the following statements describes pepsin?

#39. In a process of cellular respiration 180 ATP molecules are produced, how many moles of glucose consume during this process?

#40. Splitting of glucose (glycolysis) release small amount of energy which is enough to generate _____?

#41. Which of the following vitamins is correctly associated with its use?

#42. The movement of organic materials (food) take place through ______?

#43. Stage of meiosis in which centromeres shorten and the paired chromatids are pulled away from one another?

#44. Chemical reaction requires particular conditions to carry down at proper rate, especially?

#45. Choose the incorrect statement regarding meiosis?

#46. An animal that migrates great distances would obtain the greatest benefit from storing its energy as ____?

#47. The point where the enzyme is most active is known as ______?

#48. Select one the mismatched?

#49. What occurs in metaphase of mitosis?

#50. Stage of mitosis in which chromatids reach the poles and their movement ceases?

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