1. The plant hormone Auxin is basically a ___?
[A] Weak Organic Acid
[B] Weak Inorganic Acid
[C] Weak Organic base
[D] Gaseous compound of carbon
Show Answer
Correct Answer: A [Weak Organic Acid]
Notes:
Auxins are a class of plant hormones with some morphogen-like characteristics. Auxin is basically a Weak Organic Acid and It is produced in the stem tip that promotes the elongation in the cells.
2. Stapes, the smallest and the lightest bone in human body, is the part of which organ ?
[A] Ear
[B] Nose
[C] Neck
[D] hand
Show Answer
Correct Answer: A [Ear]
Notes:
An adult human has 206 bones while a new born baby has 300 bones. 94 bones fuse as a baby grows. The total number of bones in human skull is 29. The face of a man is made up of 14 bones. Largest and longest bone is femur (thigh bone).The shortest bone in the human body is stapes or stirrup bone in the middle ear.
3. Bile is secreted by which of the following cells?
[A] Hepatocytes
[B] Brown Fat Cells
[C] Lymphocytes
[D] Somatocytes
Show Answer
Correct Answer: A [Hepatocytes]
Notes:
Bile is secreted by Hepatocytes. It is a complex aqueous secretion that originates from hepatocytes. It is modified distally by absorptive and secretory transport systems in the bile duct epithelium.
4. Which among the following is correct about Viruses?
[A] They have DNA only
[B] They have RNA only
[C] They have both DNA & RNA
[D] They have either DNA or RNA
Show Answer
Correct Answer: D [They have either DNA or RNA]
Notes:Viruses are small infectious agents that can replicate only inside the living cells of an organism. Viruses are classified based on the type of genetic material they contain. Some viruses have DNA as their genetic material, while others have RNA. Some viruses have both DNA and RNA as their genetic material.
DNA viruses have double-stranded DNA as their genetic material. They replicate their DNA using the enzymes and machinery of the host cell. Examples of DNA viruses include herpes viruses, pox viruses, and adenoviruses.
RNA viruses have single-stranded RNA as their genetic material. They replicate their RNA using the enzymes and machinery of the host cell. Examples of RNA viruses include influenza viruses, HIV, and coronaviruses.
Viruses that have both DNA and RNA as their genetic material are known as “retroviruses.” These viruses contain a single strand of RNA, but they use an enzyme called reverse transcriptase to convert their RNA into DNA. The DNA is then integrated into the host cell’s genome and replicated along with the host cell’s DNA. Examples of retroviruses include HIV and the human T-cell leukemia virus.
5. With which of the following animals Galton’s whistle is most commonly associated?
[A] Horses
[B] Dogs
[C] whales
[D] Shark
Show Answer
Correct Answer: B [Dogs]
Notes:
Human can listen only the frequencies below 20 kHz. However animals like dogs, cats, dolphins, bats, and mice can listen above this limit. This principle was used by Galton who produced the ultrasonic waves by blowing a whistle. For human these whistle appears silent, while dogs and cats can listen it. It is used in training of dogs and cats
6. What is the number of the Chromosomes affected by Turner syndrome?
[A] 44
[B] 45
[C] 46
[D] 47
Show Answer
Correct Answer: B [45]
Notes:
Chromosomes number 45 is affected by Turner syndrome. Turner syndrome is a condition which affects only females. It results when one of the X chromosomes (sex chromosomes) is missing or partially missing.
7. The disorder “Pityriasis simplex capillitii ” is most commonly known as which among the following?
[A] Tulip fingers
[B] Dandruff
[C] Baldness
[D] Eczema
Show Answer
Correct Answer: B [Dandruff]
Notes:
The disorder “Pityriasis simplex capillitii ” is most commonly known as dandruff. Dandruff is a skin condition that mainly affects the scalp.
8. 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.
9. Brachytherapy is commonly used as an effective treatment for cervical, prostate, breast, and skin cancer in many parts of the world. Why Brachytherapy is an offshoot of which among the following forms of Cancer Treatment?
[A] Radiotherapy
[B] Chemotherapy
[C] Surgery
[D] None of them,
Show Answer
Correct Answer: A [Radiotherapy]
Notes:
Brachytherapy is commonly used as an effective treatment for cervical, prostate, breast, and skin cancer in many parts of the world. Brachytherapy is an offshoot of Radiotherapy.
10. 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.
