31. What is the unit of the Nervous system?
[A] Brain
[B] Spinal Cord
[C] Neuron
[D] Nerves
Show Answer
Correct Answer: C [Neuron]
Notes:
The units that make up the nervous system are nerve cells or neurons. Therefore, it is called the functional and structural unit of the neuron nervous system. Neuron is the largest cell in the body.
32. How many of the following senses are there?
[A] Four
[B] Five
[C] Six
[D] None of these
Show Answer
Correct Answer: B [Five]
Notes:
There are five sense organs in the human body: eyes, ears, nose, tongue, skin.
33. What are the types of cells found in the retina?
[A] Purkinje cells
[B] Schwann cells
[C] Neuroglial cells
[D] Amacrine cells
Show Answer
Correct Answer: D [Amacrine cells]
Notes:
The amacrine cell is a type of cell found in the retina. Amacrine cells lie in the inner retina and make connections with bipolar cells and ganglion cells.
34. Serum differs from blood because it lacks__
[A] antibodies
[B] clotting factors
[C] albumins
[D] globulins
Show Answer
Correct Answer: B [clotting factors]
Notes:
Serum differs from blood because it lacks clotting factors. The serum is the liquid and solute component of the blood that does not play any role in clotting. This is blood plasma without fibrinogen.
35. The ovary is surrounded by a thin covering of ___.
[A] epithelium
[B] ampulla
[C] isthmus
[D] infundibulum
Show Answer
Correct Answer: A [epithelium]
Notes:
The ovary is surrounded by a thin covering of epithelium, surrounds the ovarian stroma, and is divided into two regions – the outer cortex and the inner medulla.
36. What is the main cause of gout in the human body?
[A] too much uric acid in the body
[B] too much lactic acid in the body
[C] too much vitamins in the body
[D] too much iron in the body
Show Answer
Correct Answer: A [too much uric acid in the body]
Notes:
The main cause of gout is too much uric acid in the human body. This is a condition called hyperuricemia.
37. Where are the genes for cytoplasmic male sterility in plants located?
[A] Chloroplast genome
[B] Mitochondrial genome
[C] Cytosome
[D] None of these
Show Answer
Correct Answer: B [Mitochondrial genome]
Notes:
The genes for cytoplasmic male sterility in plants are located in the Mitochondrial genome.
38. What is the nitrogen-fixing symbiotic organism present in Azolla?
[A] nostoke
[B] anabaena
[C] aulosira
[D] azospirillum
Show Answer
Correct Answer: B [anabaena]
Notes:
Anabaena is the nitrogen-fixing symbiotic organism present in Azolla. Anabaena is a genus of filamentous cyanobacteria that exist as plankton.
39. Which of the following is the first GM crop in India?
[A] mustard
[B] brinjal
[C] potato
[D] None of these
Show Answer
Correct Answer: B [brinjal]
Notes:
Brinjal is the first GM crop in India. Genetically modified crops are plants used in agriculture and the DNA of which has been modified using genetic engineering methods.
40. What is Alzheimer’s disease?
[A] It affects liver
[B] It is a disorder of the brain
[C] It affects kidney
[D] It affects human immune system
Show Answer
Correct Answer: B [It is a disorder of the brain]
Notes:
Alzheimer’s disease is a progressive neurologic disease of the brain leading to the irreversible loss of neurons and the loss of intellectual abilities, including memory and reasoning. These with time become severe enough to impede social or occupational functioning. Alzheimer’s disease is also known as simply Senile Dementia.
