31. Arrange the correct sequence of the steps involved in the process of the Human Digestive System?
[A] Digestion, Ingestion, Assimilation, Egestion and Absorption
[B] Ingestion, Digestion, Absorption, Assimilation and Egestion
[C] Egestion, Absorption, Digestion, Assimilation and Ingestion
[D] Assimilation, Absorption, Ingestion, Digestion and Egestion
Show Answer
Correct Answer: B [Ingestion, Digestion, Absorption, Assimilation and Egestion]
Notes:
Ingestion, Digestion, Absorption, Assimilation, and Egestion are the correct sequence of the steps involved in the process of the Human Digestive System.
32. Which of the following statements is true about the human liver?
[A] Liver is triangular in shape
[B] Liver is the only visceral organ that can regenerate
[C] Liver is the largest and the internal organ of the human body
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
The liver is triangular in shape, the only visceral organ that can regenerate and the largest and internal organ of the human body.
33. What is the enzyme that breaks down lactose?
[A] Lipase enzymes
[B] Pepsin
[C] Amylase
[D] Lactase
Show Answer
Correct Answer: D [Lactase]
Notes:
Lactase is the enzyme that breaks down lactose.
34. Which of the following secretes relaxin during pregnancy?
[A] Corpus luteum
[B] Antidiuretic hormone
[C] Prolactin
[D] Adrenaline
Show Answer
Correct Answer: A [Corpus luteum]
Notes:
The Corpus luteum secretes relaxin during pregnancy. The human corpus luteum secretes relaxin, oxytocin, and progesterone.
35. What is Southern blotting?
[A] Attachment of probes to DNA fragments
[B] Transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet
[C] Comparison of DNA fragments to two sources
[D] Transfer of DNA fragments to electrophoretic gel from cellulose membrane
Show Answer
Correct Answer: B [Transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet]
Notes:
Southern blotting is the transfer of DNA fragments from electrophoretic gel to a nitrocellulose sheet.
36. Which of the following enzymes helps in the binding of DNA?
[A] Lyase
[B] Ligase
[C] Helicase
[D] Lipase
Show Answer
Correct Answer: B [Ligase]
Notes:
Ligase enzymes help in the binding of DNA. An enzyme that can catalyze the joining (bonding) of two large molecules by forming a new chemical bond is called a ligase.
37. Which enzyme in the human body helps break down carbohydrates?
[A] Lipase
[B] Amylase
[C] Peptidase
[D] Protease
Show Answer
Correct Answer: B [Amylase]
Notes:
Proteases catalyse the breakdown of proteins into amino acids in the stomach and small intestine. Lipases catalyse the breakdown of fats and oils into fatty acids and glycerol in the small intestine. Amylase catalyses the breakdown of starch into maltose in the mouth and small intestine.
38. What is the ultimate product of Glycolysis?
[A] Pyruvic acid
[B] Carbon dioxide
[C] Glucose
[D] Ethyl alcohol
Show Answer
Correct Answer: A [Pyruvic acid]
Notes:
Glycolysis, part of cellular respiration, is a series of reactions that constitute the first phase of most carbohydrate catabolism, catabolism meaning the breaking down of larger molecules into smaller ones. Glycolysis breaks down glucose and forms pyruvate with the production of two molecules of ATP. The entire process from conversion of glucose to pyruvate is anaerobic that is it does not take place in presence of oxygen.
39. Which of the following is a tapeworm?
[A] Enterobius
[B] Fasciola
[C] Taenia
[D] Schistosoma
Show Answer
Correct Answer: C [Taenia]
Notes:
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglottids with proximal mouth called scolex.
40. Which one of the following is an insectivorous plant?
[A] Nostoc
[B] Utricularia
[C] Bryophyta
[D] Sequoia Gigantia
Show Answer
Correct Answer: B [Utricularia]
Notes:
Utricularia (also called bladderworts) is a genus of insectivorous plants. They occur in fresh water and wet soil as terrestrial or aquatic species. All Utri cularia are carnivorous and capture small organisms by means of bladder-like traps. Aquatic species feed on protozoa and rotifers swimming in water-saturated soil’ while terrestrial species feed on water fleas (Daphnia), nematodes and even fish fry, mosquito larvae and young tadpoles.