11. Consider the following statements with reference to the human body:
- The common bile duct releases its contents into the stomach.
- The pancreatic duct releases its contents into the duodenum.
Which of the above statements is/are correct? (UPSC Prelims 2006)
[A] I only
[B] II only
[C] Both I and II
[D] Neither I nor II
Show Answer
Correct Answer: B [II only]
Notes:
The common bile duct and the pancreatic duct both release their contents into the duodenum, not the stomach. The digestive enzyme (pancreatic juices) are released to the duodenum from the pancreatic duct.
12. Which vitamin is also called as niacin?
[A] Vitamin C
[B] Vitamin B3
[C] Vitamin B12
[D] Vitamin B9
Show Answer
Correct Answer: B [Vitamin B3]
Notes:
Vitamin B3 is also called as niacin/Nicotinic acid with chemical formula C6H5NO2. Niacin is water soluble vitamin.
13. Which of the following whales can be easily identified by the white calluses on their heads?
[A] Humpback Whale
[B] Antarctic Minke Whales
[C] North Atlantic Right Whale
[D] None of the above
Show Answer
Correct Answer: C [North Atlantic Right Whale]
Notes:
The North Atlantic right whale is a baleen whale. At present, they are among the most endangered whales in the world. They feed on plankton and are usually found in coastal waters.
14. Who among the following discovered the cell wall?
[A] Robert Hooke
[B] Boveri
[C] J Rhodin
[D] Van Beneden
Show Answer
Correct Answer: A [Robert Hooke]
Notes:
A plant cell wall was first observed and named by Robert Hooke in 1665.
15. Green algae, red algae and brown algae are common examples of__?
[A] Thallophyta
[B] Bryophyta
[C] Pteridophyta
[D] Gymnosperms
Show Answer
Correct Answer: A [Thallophyta]
Notes:
Green algae, red algae and brown algae are common examples of Thallophyta.
16. Which of the following statements regarding algae is incorrect.
[A] Most algae are photosynthetic
[B] Algae can be classified according to their pigments
[C] All algae are filamentous
[D] Spirogyra does not produce zoospores
Show Answer
Correct Answer: C [All algae are filamentous]
Notes:
Most algae are photosynthetic, Algae can be classified according to their pigments and Spirogyra does not produce zoospores.
17. Fungi that get their food directly from dead organic matter are called?
[A] Predators
[B] Decomposers
[C] Mutualists
[D] Parasitic fungi
Show Answer
Correct Answer: B [Decomposers]
Notes:
Fungi that get their food directly from dead organic matter are called Decomposers.
18. What is a saprophytic bryophyte?
[A] Buxbaumia aphylla
[B] Ricciocarpus natans
[C] Riccia fluitans
[D] Radula sp
Show Answer
Correct Answer: A [Buxbaumia aphylla]
Notes:
Buxbaumia aphylla is a saprophytic bryophyte and does not produce abundant chlorophyll.
19. Which of the following serves as a storage room for starch in vegetables and fruits?
[A] parenchymatous
[B] collenchyma
[C] sclerenchyma
[D] All of the above
Show Answer
Correct Answer: A [parenchymatous]
Notes:
Parenchymatous serves as a storage room for starch in vegetables and fruits.
20. The bunchy top disease of the banana plants is caused by which of the following?
[A] Bacteria
[B] Fungus
[C] Virus
[D] None of the above
Show Answer
Correct Answer: C [Virus]
Notes:
The bunchy top disease of the banana plants is caused by viruses. In this disease, the plant becomes dwarf and all the leaves are deposited.
