Class 11 Biology Model Question Set A

Which of the following cell organelles is known as the "powerhouse of the cell"?

A) Ribosome

B) Mitochondria

C) Lysosome

D) Golgi apparatus

Which group of plants is commonly referred to as the "amphibians of the plant kingdom"?

A) Algae

B) Bryophytes

C) Pteridophytes

D) Gymnosperms

The genetic material present in a typical bacteriophage is usually:

A) Double-stranded DNA

B) Single-stranded RNA only

C) Proteinaceous strand

D) Free polysaccharides

The flow of energy through different trophic levels in an ecosystem is always:

A) Cyclic

B) Bidirectional

C) Unidirectional

D) Multidirectional

Protecting endangered species within their natural habitat (e.g., National Parks) is known as:

A) Ex-situ conservation

B) In-situ conservation

C) Cryopreservation

D) Botanical gardening

The branch of biology that deals with the identification, nomenclature, and classification of organisms is:

A) Morphology

B) Taxonomy

C) Ecology

D) Histology

Who proposed the theory of "Inheritance of Acquired Characters"?

A) Charles Darwin

B) Jean-Baptiste Lamarck

C) Hugo de Vries

D) August Weismann

What are the primary excretory organs of an earthworm?

A) Malpighian tubules

B) Flame cells

C) Nephridia

D) Green glands

Which compound is primarily responsible for the depletion of the stratospheric ozone layer?

A) Carbon dioxide

B) Chlorofluorocarbons (CFCs)

C) Methane

D) Nitrogen oxide

Under IUCN categories, a species facing an extremely high risk of extinction in the wild in the immediate future is classified as:

A) Vulnerable

B) Rare

C) Endangered

D) Extinct

Which molecule carries genetic information in most organisms?

A. Protein

B. DNA

C. Lipid

D. Glucose