All Free Biology MCQs with Answers
Every Biology question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
19,844 questions · page 993 of 993
- A. XX
- B. XY
- C. XO
- D. X
Explanation: In butterflies, females typically have a ZW sex-determination system, where females are ZW and males are ZZ.
Correct answer: XY- A. Alports syndrome
- B. Coffin-Lowry syndrome
- C. Hemophilia
- D. Thalassemia
Explanation: Option C is correct.Hemophilia is a condition that renders the individual less able to form blood clots.
Correct answer: Hemophilia- A. Carbohydrates
- B. Proteins
- C. Lipids
- D. Vitamins
Explanation: Carbohydrates are defined as polyhydroxy aldehydes or ketones, or compounds that yield them on hydrolysis.
Correct answer: Carbohydrates19844. Sucrose is considered as:
- A. Monosaccharides
- B. Disaccharides
- C. Polysaccharides
- D. None of these
Explanation: Sucrose is a disaccharide: one glucose unit joined to one fructose unit by a glycosidic bond, with the loss of a molecule of water.
Correct answer: Disaccharides