Botany MCQs - Everyday Science Practice | PakExamPoint
Practise Botany MCQs in Everyday Science. Attempt multiple-choice questions, check answers and revise related subtopics.
Botany MCQs and revision practice
Study Botany through multiple-choice questions in Everyday Science. This subtopic contains 333 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
Use these Botany MCQs to identify the facts, rules or methods you need to revise. Where an explanation is available, work through it and write down why your chosen option was correct or incorrect. Revisit difficult questions after reviewing your notes, then use exam mode for timed practice.
ساف فلاور (کُسُم) میں پھولوں کی ترتیب (انفلو ریسینس) کیا ہوتی ہے؟
A. Umbel
B. Capitulum
C. Raceme
D. None of these
Check answer and explanation
Answer: Capitulum
Explanation Inflorescence refers to the arrangement of flowers on a plant. Safflower (Carthamus tinctorius) belongs to the family Asteraceae . Plants of this family typically bear flowers in a capitulum (head) type inflorescence. Additional information : Capitulum is also called a head inflorescence . Common examples: sunflower, marigold, and safflower. Last verified on 23-01-2026
Explanation Aerenchyma is a specialized tissue in aquatic plants that contains large air spaces to help in buoyancy and gas exchange. It is commonly found in plants like water hyacinth and lotus to facilitate survival in aquatic environments.
Explanation Within the ovule of Pinus, a megaspore mother cell undergoes meiosis, resulting in the production of four haploid megaspores. However, only one of these megaspores survives and develops into the female gametophyte.
Explanation Banana plants propagate through suckers . They are shoots growing from the underground rhizome. They do not produce viable seeds, as commercial banana varieties are mostly sterile.
Explanation Photorespiration occurs in the Glycolate pathway (C₂ cycle) , where glycolate is formed when RuBisCO fixes oxygen instead of carbon dioxide. This process takes place in the chloroplasts, peroxisomes, and mitochondria of plants.
مندرجہ ذیل میں سے کون سا عام طور پر "خلیج گھاس" کے نام سے جانا جاتا ہے؟
A. None of these
B. Fucus
C. Chlamydomonas
D. Sargassum
Check answer and explanation
Answer: Sargassum
Explanation Sargassum is a genus of brown algae commonly found in the Sargasso Sea. It is known as " Gulf weed ." It forms floating masses in warm ocean waters . It providing habitat for marine life.
سی فور پودوں میں سب سے پہلی کاربوکسیلیشن اینزائم کون سی ہے؟
A. None of these
B. Rubisco activase
C. Phosphenol pyruvate carboxylase
D. Carbon anhydrase
Check answer and explanation
Answer: Phosphenol pyruvate carboxylase
Explanation C4 plants (e.g., maize, sugarcane) perform C4 photosynthesis to minimize photorespiration . The first enzyme to fix CO₂ is PEP carboxylase , forming a 4-carbon compound. This is different from C3 plants , where Rubisco fixes CO₂ first. PEP carboxylase has high affinity for CO₂ and does not react with O₂. Important for efficient photosynthesis in hot and dry climates . Last verified on 12-02-2026
C. Carbon dioxide will decrease and oxygen will increase
D. Carbon dioxide will increase and oxygen will decrease
Check answer and explanation
Answer: Carbon dioxide will increase and oxygen will decrease
Explanation If photosynthesis were to stop, carbon dioxide would increase and oxygen would decrease in the atmosphere. Photosynthesis is the process by which plants use sunlight t o convert carbon dioxide and water into oxygen and glucose. If this process stops, there's no new oxygen being produced, and the carbon dioxide That plants normally remove from the atmosphere would accumulate.
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