Class 11 Biology – Daily Revision MCQ (English Medium)
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Who proposed the Five Kingdom system of classification in 1969?
Chapter 2: Systematics of Living Organisms
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Answer: B. R. H. Whittaker
R. H. Whittaker proposed the Five Kingdom system in 1969, based on evolution and cell features.A bacterial 70S ribosome is made up of which two subunits?
Chapter 5: Cell Structure and Organization
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Answer: D. 50S + 30S
Bacterial ribosomes are 70S, made of a larger 50S and a smaller 30S subunit.In which sub-stage of prophase I of meiosis do chiasmata form and crossing over take place?
Chapter 7: Cell Division
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Answer: A. Pachytene
In pachytene, homologous chromosomes stay joined at chiasmata, where non-sister chromatids exchange segments (crossing over).In diakinesis, chiasmata move from the centromere towards the ends of the chromosomes. What is this movement called?
Chapter 7: Cell Division
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Answer: C. Terminalization
The shifting of chiasmata towards the chromosome ends during diakinesis is called terminalization.How many chambers does the heart of a cockroach have?
Chapter 11: Study of Animal Type: Cockroach
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Answer: B. 13
The cockroach heart has 13 chambers: 10 in the abdomen and 3 in the thorax.Which are the main excretory organs of the cockroach?
Chapter 11: Study of Animal Type: Cockroach
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Answer: D. Malpighian tubules
Malpighian tubules, attached between the midgut and hindgut, are the main excretory organs of the cockroach.In the Hatch-Slack (C4) pathway, what is the first product of CO2 fixation?
Chapter 12: Photosynthesis
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Answer: A. Oxaloacetic acid (OAA)
In C4 plants the first product of CO2 fixation is the 4-carbon compound oxaloacetic acid, hence the name C4.Mammals convert ammonia into urea in the liver and excrete it. Such animals are called:
Chapter 15: Excretion and Osmoregulation
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Answer: C. Ureotelic
Animals that convert ammonia to urea in the liver and excrete mainly urea, like mammals, are ureotelic.How many bones make up the endoskeleton of an adult human?
Chapter 16: Skeleton and Movement
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Answer: A. 206
An adult human endoskeleton has 206 bones, grouped into axial and appendicular skeleton.In a protein, amino acids are joined to one another by which bonds?
Chapter 6: Biomolecules
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Answer: B. Peptide bonds
A peptide bond joins the carboxyl group of one amino acid to the amino group of the next.
Class 11: MCQ in other subjects
All questions are written by PadhaiNotes in our own words from the chapters of the official Maharashtra State Board Balbharati textbook (ebalbharati.in). Each question shows its chapter.