31. Which of the following cells is involved in cell-mediated immunity?
[A] T-cells
[B] B-cells
[C] Mast cells
[D] Both T and B cells
Show Answer
Correct Answer: A [T-cells]
Notes:
T-cells are involved in cell-mediated immunity. T cells are produced in the bone marrow and mature in the thymus.
32. Haematuria is a disorder involving __
[A] Loss of haemoglobin in R.B.C.
[B] The loss of blood through the urine
[C] The increase in concentration blood urea
[D] Loss of glucose in urine
Show Answer
Correct Answer: B [The loss of blood through the urine]
Notes:
Haematuria is a disorder involving the loss of blood through the urine.
33. Which of the following is not a symptom of Anthrax?
[A] Rapid Breathing
[B] Low body temperature
[C] Discharge from nostrils
[D] Rapid heartbeat
Show Answer
Correct Answer: B [Low body temperature]
Notes:
Symptoms of Anthrax are:
1. Rapid Breathing
2. Discharge from nostrils
3. Rapid heartbeat
34. Which is one of the essential nutrients for the growth and development of plants?
[A] Potassium
[B] Phosphorus
[C] Nitrate
[D] Sodium
Show Answer
Correct Answer: B [Phosphorus]
Notes:
Phosphorus is one of the essential nutrients for the growth and development of plants.
35. Biotechnology has been defined by which of the following?
[A] The European Federation of Biotechnology (EFB)
[B] National Center for Biotechnology Information (NCBI)
[C] National Institutes of Health (NIH)
[D] National Centre for Cell Science (NCCS)
Show Answer
Correct Answer: A [The European Federation of Biotechnology (EFB)]
Notes:
Biotechnology has been defined by The European Federation of Biotechnology (EFB).
36. Synapse gap is present between which of the following?
[A] Two Kidneys
[B] Two neurons
[C] Brain and Spinal Cord
[D] None of the above
Show Answer
Correct Answer: B [Two neurons]
Notes:
The gap between the two neurons is called the synapse. It is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron. Synapses are essential to neuronal function : neurons are cells that are specialized to pass signals to individual target cells, and synapses are the means by which they do so.
37. Which one of the following organs converts glycogen into glucose and purifies the blood?
[A] Spleen
[B] Lungs
[C] Liver
[D] Kidney
Show Answer
Correct Answer: C [Liver]
Notes:
Liver produces bile which is stored in the gall bladder. Liver is the largest gland in the body. Bite contains bite pigments and bite salts i.e. sodium and potassium glycocholates.
38. Which among the following is an example of dicot seed?
[A] Rice
[B] Pulses
[C] Wheat
[D] Maize
Show Answer
Correct Answer: B [Pulses]
Notes:
Pulses are example of dicots since they have two cotyledons (dicot is short for ‘dicotyledon’, and ‘di’ means two). They contain two seeds inside the seed coat. Legumes (a family of plants that includes pluses, beans, peas and lentils) are all examples of dicot seeds.
39. ___ is the study of viruses:
[A] Mycology
[B] Protozoology
[C] Virology
[D] Parasitology
Show Answer
Correct Answer: C [Virology]
Notes:
Virology is the branch of science that deals with the study of viruses. It focuses on the following aspects of viruses: their structure, classification and evolution, their ways to infect and exploit host cells for reproduction, their interaction with host organism physiology and immunity, the diseases they cause, and their use in research and therapy.
40. The smallest flowering plant is ____:
[A] Lemma
[B] Wolffia
[C] Ficus
[D] Azolla
Show Answer
Correct Answer: B [Wolffia]
Notes:
Wolffia is a genus of 9 to 11 species which include the smallest flowering plants on Earth. Commonly called water-meal or duckweed, these aquatic plants resemble specks of cornmeal floating on the water. Wolffia species are free-floating thalli, green or yellow-green, and without roots. The flower is produced in a depression on the top surface of the plant body. It has one stamen and one pistil.
