DCOA Mixed Practice Test #581

Question 1

Cardamom Hills are in which district?‌​‍

Accepted Answer

Idukki — The Cardamom Hills are in Idukki district — India's major cardamom growing region.‌​‍

Answer

Wayanad

Answer

Palakkad

Answer

Thrissur

Question 2

The Silent Valley National Park is in:‌​‍

Accepted Answer

Palakkad — Silent Valley NP lies in the Nilgiri Biosphere Reserve in Palakkad district, Kerala.‌​‍

Answer

Ernakulam

Answer

Idukki

Answer

Wayanad

Question 3

Contact process produces:‌​‍

Accepted Answer

H₂SO₄ (SO₂ → SO₃ → oleum → H₂SO₄) — V₂O₅ catalyst for SO₂ + ½O₂ → SO₃. Ostwald process makes HNO₃.‌​‍

Answer

HNO₃

Answer

HCl

Answer

NH₃

Question 4

Scurvy = deficiency of:‌​‍

Accepted Answer

C — Vitamin C.‌​‍

Answer

A

Answer

B

Answer

D

Question 5

Which of the following statements concerning prominent Indian sports personalities and their literary works/nicknames is correct?

Accepted Answer

B. Sachin Tendulkar's autobiography is titled 'Playing It My Way'. — 'Playing It My Way' is the well-known autobiography of legendary cricketer Sachin Tendulkar, making option B correct. 'Unbreakable' is Mary Kom's autobiography, while P.T. Usha is famously known as the 'Payyoli Express', disproving options A and C respectively. 'Ace Against Odds' is the autobiography of Sania Mirza, not M.S. Dhoni, making option D incorrect.

Answer

A. 'Unbreakable' is the autobiography of Saina Nehwal.

Answer

C. P.V. Sindhu is famously known by the nickname 'Payyoli Express'.

Answer

D. M.S. Dhoni authored the book 'Ace Against Odds'.

Question 6

Which functional group is primarily responsible for the antibacterial activity of penicillin antibiotics?

Accepted Answer

B. Beta-lactam ring — The beta-lactam ring is the critical structural component of penicillin and other beta-lactam antibiotics. It is essential for inhibiting bacterial transpeptidases (penicillin-binding proteins), which are crucial for bacterial cell wall synthesis. The other components contribute to stability, spectrum, or pharmacokinetics but are not the primary pharmacophore.

Answer

A. Thiazolidine ring

Answer

C. Carboxylic acid group

Answer

D. Amide side chain

Question 7

Bekal Fort in:‌​‍

Accepted Answer

Kasaragod — Largest fort of Kerala — Kasaragod.‌​‍

Answer

Kannur

Answer

Ernakulam

Answer

Kozhikode

Question 8

A significant crude oil spill has occurred along the Kerala coastline, posing severe threats to marine biodiversity and local livelihoods. Considering both efficacy and environmental sustainability, which biotechnological strategy would be the most appropriate for remediation?

Accepted Answer

C. Deploying genetically engineered microorganisms (GEMs) specifically designed for enhanced hydrocarbon degradation, along with biostimulation techniques. — Option C, deploying genetically engineered microorganisms (GEMs) with biostimulation, represents the most advanced and effective biotechnological approach for large-scale crude oil spill remediation. GEMs can be tailored for enhanced and rapid degradation of specific hydrocarbons, offering superior efficiency compared to naturally occurring microbes. Option A, while using natural bacteria, may be less efficient and the introduction of non-native strains from 'other sites' could pose ecological risks. Option B is a chemical method, not biotechnological, and can introduce secondary pollutants. O

Answer

A. Introducing large quantities of naturally occurring, indigenous oil-degrading bacteria collected from other contaminated sites.

Answer

B. Applying chemical dispersants to break down the oil, followed by physical removal.

Answer

D. Implementing phytoremediation using oil-tolerant mangrove species.

Question 9

As per the national immunization schedule in India, which vaccine is given to protect against Tuberculosis and is typically administered at birth or as early as possible?

Accepted Answer

A. BCG — BCG (Bacillus Calmette-Guérin) vaccine is administered at birth or as early as possible to protect against Tuberculosis. DPT (Diphtheria, Pertussis, Tetanus) is given in multiple doses starting at 6 weeks. IPV (Inactivated Polio Vaccine) is also given at 6 and 14 weeks. Hepatitis B (HepB) is given at birth (birth dose) but primarily protects against Hepatitis B, not Tuberculosis.

Answer

B. DPT

Answer

C. Polio (IPV)

Answer

D. Hepatitis B (HepB)

Question 10

Palakkad is called the 'Granary of Kerala' because of:‌​‍

Accepted Answer

Rice/paddy cultivation — Palakkad has the largest paddy cultivation area in Kerala, enabled by the Palakkad Gap's plains.‌​‍

Answer

Spice cultivation

Answer

Rubber cultivation

Answer

Tea cultivation

DCOA Mixed Practice Test #581