The enzyme(s) called ____________ break(s) down the substrate called_________________.
lactose; lactase
lipases; micelles
peptidases; proteins
lactase; glucose
The Correct Answer is C
A. Lactose; lactase: Lactase is the enzyme that breaks down lactose, not the other way around.
B. Lipases; micelles: Lipases break down lipids (fats) into fatty acids and glycerol, not micelles. Micelles are formed as part of the digestion process but are not the substrate for lipases.
C. Peptidases; proteins: Peptidases (or proteases) break down proteins into smaller peptides and amino acids. This is the correct answer.
D. Lactase; glucose: Lactase breaks down lactose into glucose and galactose, not just glucose.
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Correct Answer is D
Explanation
A. Salivary glands are accessory organs of digestion as they secrete saliva containing enzymes to start digestion.
B. Liver is an accessory organ involved in digestion, particularly in bile production and processing nutrients.
C. Pancreas is an accessory organ that secretes digestive enzymes into the small intestine.
D. Spleen is not involved in digestion; it is primarily involved in immune function and blood filtration.
Correct Answer is B
Explanation
A. During pubarche: Pubarche refers to the onset of puberty, but oogenesis (the formation of oocytes) begins much earlier, during embryonic development.
B. During embryonic development: Oogenesis begins during embryonic development when the female fetus's ovaries form and start producing primary oocytes. These oocytes remain in a suspended state until puberty.
C. During thelarche: Thelarche is the onset of breast development during puberty, but oogenesis starts long before this, during embryonic development.
D. At birth: While primary oocytes are present at birth, the process of oogenesis actually begins during embryonic development, not at birth.