1. Which among the following has a fibrous root?
[A] Grass
[B] Mize
[C] Carrot
[D] Rice
Show Answer
Correct Answer: A [Grass]
Notes:
A fibrous root system is universal in monocotyledonous plants and ferns. It is the opposite of a taproot system and usually formed by thin, moderately branching roots growing from the stem. Fibrous root system is present in grass.
2. Among typhoid, hysteria, measles & influenza which is / are not contagious disease(s)?
[A] Hysteria only
[B] Hysteria & Measles
[C] Hysteria, Typhoid & Measles
[D] All are contagious diseases
Show Answer
Correct Answer: A [Hysteria only]
Notes:
Among typhoid, hysteria, measles & influenza, only Hysteria is not a contagious disease. A contagious disease is a subset category of transmissible diseases, which are transmitted to other persons.
3. Which of the following places are main centers of silicosis and silico-tuberculosis diseases affecting the workers in India?
[A] Glass Factories
[B] Stone quarries and stone crushing factories
[C] Fireworks Factories
[D] Brick Kilns
Show Answer
Correct Answer: B [Stone quarries and stone crushing factories]
Notes:
Chronic exposure to silica increases workers risk of tuberculosis infection and aggravates pre-existing pulmonary tuberculosis. Therefore the workers working in the places like Stone quarries and stone crushing factories are mainly prone to silicosis and silico-tuberculosis diseases.
4. Which among the following diseases is very rare in women compared to the men affected with the same disorder?
[A] Osteoporosis
[B] Color blindness
[C] Nyctalopia
[D] Down Syndrome
Show Answer
Correct Answer: B [Color blindness]
Notes:
Color blindness diseases is very rare in women compared to the men affected with the same disorder. Color blindness often happens when someone is not able to distinguish between certain colors.
5. Which among the following Vitamin is added to the milk in some countries as it is lost during the process of Fat Removal (Skimming)?
[A] Vitamin A
[B] Vitamin B
[C] Vitamin C
[D] Vitamin D
Show Answer
Correct Answer: A [Vitamin A]
Notes:
Vitamin A is added to the milk in some countries as it is lost during the process of Fat Removal called Skimming. Vitamin A is important for good vision, a healthy immune system, and cell growth.
6. What is the average life of the Red Blood corpuscles?
[A] 100-120 days
[B] 120-140 days
[C] 80-95 days
[D] 70-85 days
Show Answer
Correct Answer: A [100-120 days]
Notes:
The average life of the Red Blood corpuscles is 100-120 days. Red blood cells are also known as red cells, red blood corpuscles, haematids, erythroid cells or erythrocytes.
7. Pest-resistant cotton commonly known as ‘Bt-Cotton’ is genetically engineered by inserting a gene from a:
[A] Bacterium
[B] Virus
[C] Microalgae
[D] Protist
Show Answer
Correct Answer: A [Bacterium]
Notes:
Bt cotton is an insect-resistant transgenic crop designed to combat the bullworm. Bt is a soil bacterium containing Cry genes that encode crystal proteins which are fatal to some Lepidopteran caterpillars when ingested.
8. Gram Positive Bacteria can be identified by the Gram staining because of the following reasons?
[A] The cell walls have more lipids compared to peptidoglycan
[B] The Cells walls have more Peptidoglycan compared to Lipids
[C] The Cells membrane has more fatty acids
[D] The plasma has Peptidoglycans
Show Answer
Correct Answer: B [ The Cells walls have more Peptidoglycan compared to Lipids]
Notes:
The cell wall which is made up of Peptidoglycan as well as lipids gets violet due to the reaction of the CV+. After the decolorization with alcohol, the lipids gets dissolved and the bacteria with higher Peptidoglycan remain violet. These are called Gram Positive bacteria.
9. ‘Ophiology’ is the study of which of the following animals?
[A] Moths and Butterflies
[B] Snakes
[C] Whales
[D] Ants
Show Answer
Correct Answer: B [Snakes]
Notes:
Ophiology is the branch of Biology that study Snakes. Thus Option [B] is correct. While the study of Moths and Butterflies is called as Lepidoteriology, The study of whale is called as Cetology and the study of Ants is called as Myrmecology.
10. Which of the following bacteria is responsible for the formation of curd?
[A] Yeast
[B] Lycopodium
[C] Lacto-bacillus
[D] Fungus
Show Answer
Correct Answer: C [Lacto-bacillus]
Notes:
Lactobacillus Bacteria in Milk changes Milk to Curd. When milk is heated to a temperature of 30-40 degrees centigrade and a small amount of old curd added to it, the lactobacillus in that curd sample gets activated and multiplies. These convert the lactose into lactic acid.
