Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Human Reproduction

Multiple Choice Questions

211.

Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?

Chorion
Allantois
Yolk sac
Amnion

212.

Prothallus of the fern produces

Spores
Gametes
Both (a) and (b)
Cones

213.

In human, during fertilization, a sperm firstly comes in contact with which layer of the ovum

Zona pellucida
Vitelline membrane
Jelly coat
Zona radiata

214.
Due to alcohol abuse, brain-related disease Korsakkoff’s syndrome occurs. Which nutrient is responsible for this syndrome?

Vitamin-B₁₂

Fat

Protein

Vitamin-B₁

Vitamin-B₁

Alcohol interferes with the metabolism of thiamine in the liver. Thus, alcohol intake with deficiency of vitamin B is the basis of brain related diseases called Wernicke's syndrome and Korsakoff's syndrome. Both the syndromes are associated with the destruction of cells in brain with the memory loss even of recent events and mental confusion along with the impairment of speech.