1. Which among the following function as locus of biochemical reactions?
[A] Cell plasma
[B] Cell membrane
[C] Cell walls
[D] None of the above
Show Answer
Correct Answer: B [Cell membrane]
Notes:
The cells membranes hold enzymes of sequential reactions in close proximity
2. The 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.
3. Deposition of which among the following in the joints, causing inflammation is reason of Gout, one of the forms of arthritis?
[A] Lactic Acid
[B] Oxalic Acid
[C] Acetic Acid
[D] Uric Acid
Show Answer
Correct Answer: D [Uric Acid]
Notes:
Gout is caused by deposition of uric acid crystals in the joint, causing inflammation. There is also an uncommon form of gouty arthritis caused by the formation of rhomboid crystals of calcium pyrophosphate known as pseudogout. In the early stages, the gouty arthritis usually occur in one joint, but with time, it can occur in many joints and be quite crippling. The joints in gout can often become swollen and lose function.
4. Why does the peepal tree continuously produce oxygen?
[A] C3 Photosynthesis
[B] C4 Photosynthesis
[C] Crassulacean Acid Metabolism
[D] Carbon Cycle Rebalancing
Show Answer
Correct Answer: C [Crassulacean Acid Metabolism]
Notes:
Peepal tree has the capability to absorb CO² at night due to Crassulacean Acid Metabolism (CAM). It’s a photosynthesis pathway primarily found in desert plants and epiphytes (those that live on larger trees). During the day, CAM plants break down the malate created at night and use the released CO² to create sugars, similar to C3 plants. But, CAM, being energy inefficient, is used only under certain conditions. It seems that peepal trees use CAM when they are epiphytic and switch to C3 photosynthesis when they settle in the soil.
5. Which of the following fishes lives in Ocean but moves to fresh water stream during reproduction?
[A] Eel
[B] Salmon
[C] Hilsa
[D] Herring
Show Answer
Correct Answer: B [Salmon]
Notes:
Most salmon are anadromous fish which means that they are born in freshwater (rivers or streams), and travel to and live much of their lives in salt water and return to freshwater during reproduction and spawning. After spawning, all Pacific salmon and up to 50% of other species die within a few weeks.
6. Where in the human body is the stapedius muscle situated?
[A] Nose
[B] Ears
[C] Leg
[D] Eyes
Show Answer
Correct Answer: B [Ears]
Notes:
The stapedius muscle is the smallest skeletal muscle in the entire body that is located in the middle ear. Specifically, the stapedius muscle originates from a cone-shaped structure in the tympanic cavity of each ear and then extends to the stapes bone.
7. Who proposed five kingdom classification?
[A] Ernst Mayr
[B] M.W.Beijerinck
[C] R.H. Whittaker
[D] D.I Ivanovsky
Show Answer
Correct Answer: C [R.H. Whittaker]
Notes:
The five kingdom classification was proposed by R.H. Whittaker in 1969. The five kingdoms were formed on the basis of characteristics. It includes Kingdom Monera, Kingdom Protista, Kingdom Fungi, Kingdom Plantae, and Kingdom Animalia.
8. Which gland acts as thermostat of human body?
[A] Pancreas
[B] Pituitary
[C] Thyroid
[D] Hypothalamus
Show Answer
Correct Answer: D [Hypothalamus]
Notes:
Hypothalamus acts as the thermostat of human body as it regulates the body temperature as the same way a thermostat controls the room temperature. It is located in the skull of the human body.
9. Pollination by which among the following is called as ornithophily?
[A] Rodents
[B] Aquatic animals
[C] Ants
[D] Birds
Show Answer
Correct Answer: D [Birds]
Notes:
Ornithophily refers to the pollination assisted by the birds. Ornithology is a branch of science which studies about birds. Dr. Salim Ali is a famous Indian ornithologist.
10. Study of the chemical nature of cells and tissues is known as__?
[A] Biochemistry
[B] Conchology
[C] Histochemistry
[D] Dermatology
Show Answer
Correct Answer: C [Histochemistry]
Notes:
Histochemistry combines the techniques of biochemistry and histology in the study of the chemical constitution of cells and tissues.
