Class 11 Biology · Chapter 4 · Test 1
Biological Molecules Part 1
50 MCQs This set covers biochemistry, the types of bonds in biology, condensation and hydrolysis, and the properties of water as the medium of life. It also covers the classification of carbohydrates, including monosaccharides, isomers, disaccharides and polysaccharides.
50 questions · 35 min · 50 marks
Want to try first? Take the free Biology test: Biodiversity Part 1
Sample questions
The first 5 of 50. Try each one, then tap to see the answer.
Question 1
Biochemistry is the study of
- AChemical components and processes in living organisms
- BOnly plant structure
- COnly animal behaviour
- DRocks and minerals
Show answerHide answer
Answer: A
Biochemistry deals with the chemical organization and processes of living organisms.
Question 2
All the chemical reactions taking place within a cell are collectively called
- AMetabolism
- BDigestion
- COsmosis
- DExcretion
Show answerHide answer
Answer: A
Metabolism includes anabolism and catabolism.
Question 3
In anabolism
- AComplex molecules are broken into simpler ones
- BSimpler substances are combined to form complex ones
- COnly water is lost
- DOnly energy is released
Show answerHide answer
Answer: B
Catabolism is the breakdown of complex molecules into simpler ones.
Question 4
At least what percentage of the mass of living organisms is water?
- A20 percent
- B50 percent
- C80 percent
- D100 percent
Show answerHide answer
Answer: C
Protoplasm is at least 80 percent water.
Question 5
Carbohydrates and proteins and lipids and nucleic acids make up what percentage of the dry mass of organisms?
- A50 percent
- B73 percent
- C93 percent
- D100 percent
Show answerHide answer
Answer: C
The remaining 7 percent is small organic molecules and inorganic molecules.
More tests in Biological Molecules
Practise with a free account
Save your scores, see which chapters need work, and keep a notebook of every question you got wrong.