Biology MCQS

321. Smallest disease-causing agents in plants are ?
A: virion
B: mycoplasma
(C: viroids)
D: prions

322. Enzyme present in saliva is_____________?
A: lipase
B: trypsin
(C: ptyalin)
D: invertase

323. Which disease can be controlled by vaccination?
A: Measles
B: Cancer
C: Diabetes
(D: Heart attack)

324. The major cell infected by the HIV is lymphocyte?
A: helper-T
B: B
C: both T and B
(D: none of these)

325. Vaccine was first developed by_______________?
A: Louis Pasture
(B: Edward Jenner)
C: Jaber Ibn Hayan
D: Aristotle

326. Pigment present in red algae is_____________?
A: fucoxanthin
B: phycocyanin
(C: phycoerythrin)
D: bilirubin

327. Which disease has been totally eradicated from the world because of effective vaccination?
A: Measles
B: Polio
(C: Smallpox)
D: Hepatitis

328. Nutrition in fungi is___________?
A: Photosynthetic
B: Chemosynthetic
C: Completely parasitic
(D: Absorptive heterotrophs)

329. Which of the following statements is incorrect about antibiotics?
A: They are used against microorganisms
B: They are always effective against bacteria
C: They are used in diseases like tuberculosis and pneumonia
(D: They are derived from bacteria only)

330. Which of these is an anti-viral protein?
(A) Urokinase
(B) Thymosin
(C) Insulin
(D) Interferon