Biology – Class 11 Practice Test 5

1. In which phase do the centrosomes start moving to the opposite poles of the cell?

Prophase

Anaphase

Metaphase

Telophase

2. Which level of organization do beta sheets belong to?

Primary

Quaternary

Tertiary

Secondary

3. Which of these is present in the acid insoluble fraction of living tissue?

DNA

ascorbic acid

Riboflavin

Magnesium

4. What reaction is catalyzed by carbonic anhydrase?

Breakdown of carbohydrates

Breakdown of lipids

Formation of carbonic acid

Formation of cholesterol

5. What is the phenomenon of nuclear division known as?

Telekinesis

Karyokinesis

Autokinesis

Cytokinesis

6. Which molecule can starch hold in its helix?

Amylopectin

Cellulose

Iodine

DNA

7. Which of these conditions signify an exothermic reaction?

The energy of the product is higher than that of the substrate

The energy of the product is lesser than that of the enzyme-substrate complex

The energy of the product is equal to that of the substrate

The energy of the product is lesser than that of the substrate

8. Micro-molecules of the tissue are also known as ______

biomacromolecules

biomolecules

bio compounds

nanoparticles

9. Protein synthesis takes place in _____

G1 phase

G2 phase

G0 phase

S phase

10. In which of the following organisms, starch is present as a storehouse of energy?

Plants

Bacteria

Mycoplasma

Animal