01. A hormone that induces fruit repening is ________________.

Ans. Ethylene.

02. Which of the following is non-reducing sugar?

a) Sucrose b) Galactose

c) Mannose d) Glucose.

Ans. Sucrose.

03. F₁ particle is present in _____________.

Ans. Mitochondria

04. Triple fusion in angiosperm is the fusion of second sperm with

a) One antipodal cell and one synergid cell

b) Two antipodal cells

c) Two synergid cells

d) Two polar nuclei.

Ans. Two polar nuclei.

05. Raphides found in aroids are ____________.

Ans. Calcium oxalate.

06. In oxidative photophosphorylation, the last three steps are as follows

a) absorbing site

b) yielding site

c) No H⁺ is absorbed or released

d) yielding site and absorbing site.

Ans. yielding site and absorbing site.

07. Senescence is inhibited by ________.

Ans. Cytokinin

08. Jute fibre deteriorates quickly due to

a) Low cellulose b) High cellulose

c) Low lignin d) High lignin

Ans. High cellulose

09. AUG codes for ___________.

Ans. Methionine

10. A normal spontaneous rate for a single gene is one mutation in every ______.

Ans. 10⁶ to 10⁹ replication

11. RNA contains uracil instead of ______.

Ans. Thymine

12. Compound responsible for red colour of tomato is __________.

Ans. Lycopene.

13. Algae attached to stone is called _______.

Ans. Epilithic

14. The structure present in cyanobacteria (BGA) helping in N₂ fixation is _______.

Ans. Heterocyst

15. Root cap is absent in _____.

Ans. Pistia

16. A plant which lives for few days is called _________.

Ans. Ephermeral

17. Which amino acids are present in histones ?

a) Arginine & Lysine

b) Arginine & Histidine

c) Lysine & Histidine

d) Valine & Histidine.

Ans. Arginine & Lysine

18. Cell plate formation starts from

a) Phragmoplast b) Protoplast

c) Tonoplast d) Epiplast

Ans. Phragmoplast

19. Fluid mosaic model was given by _____.

Ans. Singer & Nicolson

20. Vascular bundle is called closed when _________.

Ans. Cambium is absent

21. Natural system of classification was proposed by ____________.

Ans. Bentham & Hooker.

22. Length of day and night periods that regulates flowering is____________.

Ans. Photoperiodism.

23. Storage food material of fungi is__________.

Ans. Glycogen.

24. Chitin is present in the cell wall of________________.

Ans. Fungi.