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Life Processes Class 10 MCQ with Answers. We covered all the Life Processes Class 10 MCQ with Answers in this post for free so that you can practice well for the exam.
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MCQ on Life Processes for Class 10th Students
Which coenzyme functions as a hydrogen acceptor during the light-dependent phase of photosynthesis?
(A) PQ
(B) FAD
(C) COQ
(D) NADP
Option d – NADP
Arrange the following stages of the nitrogen cycle in the correct order:
(i) Denitrification
(ii) Nitrogen fixation
(iii) Ammonification
(iv) Nitrification
(A) ii – iv – iii – i
(B) ii – iii – iv – i
(C) i – iii – ii – iv
(D) iv – iii – ii – i
Option b – ii – iii – iv – i
Which steps in glycolysis involve the consumption of ATP?
i. Glucose → Glucose-6-phosphate
ii. Glucose-6-phosphate → Glucose
iii. Fructose-6-phosphate → Fructose 1,6-bisphosphate
iv. Fructose-1,6-phosphate → Fructose-6-phosphate
(A) i and ii
(B) ii and iii
(C) i and iii
(D) iii and iv
Option c – i and iii
Choose the correct option based on the statements below:
Statement I: Gibberellin GA1 is widely applied in brewing to enhance malting.
Statement II: Gibberellins can delay fruit ripening.
(A) Both statements are true
(B) Both statements are false
(C) Only Statement I is true
(D) Only Statement II is true
Option d – Only Statement II is true
What is the primary benefit of encystment in Amoeba?
(A) expulsion of metabolic wastes
(B) endurance during unfavorable conditions
(C) ability to survive without food temporarily
(D) defense from predators and parasites
Option b – endurance during unfavorable conditions
A genetically identical offspring population is observed in a cross-pollinated plant. Which process explains this?
(A) parthenocarpy
(B) apomixis
(C) induced mutation
(D) polyploidy
Option b – apomixis
Which of the following statements is incorrect?
(A) Mineral movement in xylem occurs in one direction
(B) Sucrose unloading at sinks does not require ATP
(C) Phosphorus, sulphur, nitrogen, and potassium are highly mobile in plants
(D) Molecule movement through phloem can be in both directions
Option b – Sucrose unloading at sinks does not require ATP
Which of the following statements is not correct?
(A) Some photosynthesis can occur beyond the blue and red light spectrum
(B) Chlorophyll-a shields other pigments from photo-oxidation
(C) Chlorophyll-a plays a central role in photosynthesis
(D) Chlorophyll-a shows minimal absorption between 500–600 nm
Option b – Chlorophyll-a shields other pigments from photo-oxidation
Select the wrongly matched pair:
(A) Yeast – Ethanol
(B) Streptomyces – Antibiotic
(C) Clostridium – Vinegar
(D) Methanogens – Biogas
Option c – Clostridium – Vinegar
Why is satellite DNA significant?
(A) codes for enzymes involved in DNA duplication
(B) contains genes for proteins used in the cell cycle
(C) displays population-level polymorphism that is inherited
(D) lacks coding function and remains uniform in all organisms
Option c – displays population-level polymorphism that is inherited
Which of the following statements is accurate?
(A) In Ulothrix, gametes lack flagella and differ in size
(B) Algae account for roughly half of the global CO₂ fixation
(C) Brown algae appear so due to the pigment r-phycoerythrin
(D) Chlamydomonas is a multicellular alga consumed as food
Option b – Algae account for roughly half of the global CO₂ fixation
Pneumatophores are typically observed in
(A) aquatic submerged plants
(B) freely floating aquatic plants
(C) salt-tolerant plants
(D) insectivorous plants
Option c – salt-tolerant plants
The edible portion and water of a coconut represent
(A) endosperm
(B) endocarp
(C) mesocarp
(D) embryo
Option a – endosperm
Identify the correct statement from the following:
(A) Grass seeds are non-endospermic
(B) Mango fruits are formed through parthenocarpy
(C) Maize grain contains a protein-rich aleurone layer
(D) A sterile pistil is known as a staminode
Option c – Maize grain contains a protein-rich aleurone layer
If given a mature dicot stem and root, which feature helps distinguish them?
(A) secondary xylem
(B) secondary phloem
(C) protoxylem
(D) cortex cells
Option c – protoxylem
Which one of the following statements is incorrect?
(A) Mycoplasma lacks a cell wall
(B) Bacterial cell walls are made of peptidoglycan
(C) Pili and fimbriae are used for bacterial movement
(D) Cyanobacteria do not possess flagella
Option c – Pili and fimbriae are used for bacterial movement
What is the proper sequence of phases in the mitotic cell cycle?
(A) G₁ → S → G₂ → M
(B) M → G₁ → G₂ → S
(C) G₁ → G₂ → S → M
(D) S → G₁ → G₂ → M
Option a – G₁ → S → G₂ → M
What is the currently accepted explanation for stomatal opening and closing?
(A) breakdown of starch
(B) photosynthesis in guard cells
(C) water loss by transpiration
(D) movement of potassium ions
Option d – movement of potassium ions
Which of the following pairs is incorrectly matched?
(A) Potato – Solanum tuberosum
(B) Wheat – Triticum aestivum
(C) Mango – Musca domestica
(D) Lion – Panthera leo
Option c – Mango – Musca domestica
Which option correctly shows the taxonomic hierarchy from lowest to highest?
(A) Genus → Family → Class → Order → Phylum → Kingdom → Species
(B) Species → Genus → Family → Order → Class → Phylum → Kingdom
(C) Species → Family → Genus → Kingdom → Order → Class → Phylum
(D) Species → Genus → Family → Class → Order → Phylum → Kingdom
Option b – Species → Genus → Family → Order → Class → Phylum → Kingdom
Choose the correct option based on the statements given:
Statement I: Gonyaulax produces harmful toxins that may kill marine life like fish.
Statement II: Gonyaulax shows rapid multiplication and causes red tides.
(A) Only Statement I is correct
(B) Only Statement II is correct
(C) Both statements are correct
(D) Both statements are incorrect
Option c – Both statements are correct
Which of the following statements is correct?
(A) Lichens are poor indicators of air pollution
(B) Lichens do not survive in polluted environments
(C) Algae in lichens are known as mycobionts
(D) The fungal part in lichens is referred to as phycobiont
Option b – Lichens do not survive in polluted environments
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