MCQs

Q21: Menstrual cycle can be divided into ______?

• A) Four phases
• B) Single phase
• C) Two phases

Q22: Metabolically dormant body produced within the bacterial cell membrane is ______?

• A) Spore
• B) Capsule
• C) Cyst

Q23: Nitrogen fixing bacteria in root nodules fix nitrogen in soil air into _____?

• A) Amino acid
• B) Ammonia
• C) Nitrite

Q24: Only one ovary is functional at a time in ______?

• A) Pigeon
• B) Human
• C) Eagle

Q25: Oxygen is transported by combining with ______ in Hb.

• A) Hydrogen
• B) Nitrogen
• C) Iron

Q26: Pectoral fins are enlarged in ______?

• A) Plaice
• B) Whale
• C) Skates

Q27: Percentage of magnesium by mass of a human being is ______?

• A) 0.35%
• B) 0.005%
• C) 0.25%

Q28: Pick the correct option about Drosophila: Salivary gland cells have giant chromosomes in their nuclei, Male is larger with pointed abdomen, Female has sex combs on front legs, It has generation time of just eight weeks

• A) Salivary gland cells have giant chromosomes in their nuclei
• B) Male is larger with pointed abdomen
• C) Female has sex combs on front legs

Q29: Pick the mismatched pair for birds: Keel – attachment of muscles, Air spaces – lighter body, Pectoral muscles – strong pull of wings, Urinary bladder – producing semisolid urine

• A) Keel – attachment of muscles
• B) Air spaces – lighter body
• C) Urinary bladder – producing semisolid urine

Q30: Plant on which teliospores attack produces ______ in its seeds.

• A) Monokaryotic hyphae
• B) Teliospores
• C) Dikaryotic hyphae