Biology Biomolecules - Online Test
Q1. Lipids that are found in the cell membrane are
Answer : Option C
Explaination / Solution:
Some lipids have phosphorous and a phosphorylated organic compound in them. These are phospholipids. They are found in cell membrane.
Q2. Chitin occurs in cell wall of
Answer : Option C
Explaination / Solution:
The cell wall of fungi is made of chitin,complex sugar molecules. The cell wall of plants are made up of cellulose.
Q3. Which of the following is not obtained on hydrolysis of nucleic acid?
Answer : Option D
Explaination / Solution:
Hydrolysis of nucleic acid (DNA and RNA) produces pentose sugar ( ribose or deoxyribose) purine and pyrimidine. Phosphoric acid is not released on hydrolysis of DNA or RNA.
Q4. No cell could live without
Answer : Option B
Explaination / Solution:
Enzymes are bio-catalyst. All the metabolic biochemical reactions are carried out with the help of enzyme. No cell could survive without enzyme.
Q5. The most abundant organic molecule present on earth is
Answer : Option B
Explaination / Solution:
Cellulose is the most abundant organic molecule present on earth. Cellulose forms the cell wall of all plant cells. Cell wall is the outermost protective layer of cell.
Q6. 98% of living body is formed of six elements- C, H,N,O and
Answer : Option C
Explaination / Solution:
Everything in universe is made up of elements. The body of living organisms contain mainly six elements. These are carbon, hydrogen, oxygen phosphorous and Sulphur. In facts, 98% of living body is formed on these six elements.
Q7. Element located in centre of pophyrin ring of chlorophyll is
Answer : Option C
Explaination / Solution:
Chlorophyll molecule consists of a porphyrin ring and a long tail like chain of carbon and hydrogen. The centre of pophyrin ring is occupied by Mg ions.
Q8.
What should be TDS of and in soft water?
Answer : Option D
Explaination / Solution:
TDS stands for total dissolved solids which are inorganic salts dissolved in water. The TDS of soft water should be up to 120 ppm.
Q9. Identify the incorrect pair in the following
Answer : Option B
Explaination / Solution:
Haemoglobin present in blood transport gases, RNA ( tRNA and mRNA) are involved in proteinsynthesis and steroids are used as sex stimulating chemicals but glucose is not a storage product.
Q10. Which of the following metabolites are incorrect pairs?
Answer : Option D
Explaination / Solution:
Ricin and abrin are toxins.
