DCOA Mixed Practice Test #398

Question 1

Which of these has the shortest wavelength among electromagnetic waves?

Accepted Answer

Gamma rays — Gamma rays (< 0.01 nm) have the shortest wavelength / highest frequency.

Answer

Radio

Answer

Microwave

Answer

Visible

Question 2

Gir National Park famous for:‌​‍

Accepted Answer

Asiatic Lion — Gir, Gujarat — only home of Asiatic Lion.‌​‍

Answer

Elephant

Answer

Rhinoceros

Answer

Bengal Tiger

Question 3

Biodegradable plastics can be broken down by:

Accepted Answer

Microorganisms / natural processes — Biodegradable plastics (PLA, PHB) are broken down by bacteria/fungi into water and CO₂.

Answer

UV radiation only

Answer

Water alone

Answer

High heat only

Question 4

Chandrayaan-2 was launched in July 2019 — its lander named:‌​‍

Accepted Answer

Pragyan and Vikram (lander + rover) — Vikram = lander (named after Vikram Sarabhai); Pragyan = rover. ‌​‍Chandrayaan-2 lander crashed. Chandrayaan-3 (Aug 2023) soft-landed successfully.

Answer

Vikram

Answer

Pragyan

Answer

Kalpana

Question 5

BrahMos missile is a joint venture with:‌​‍

Accepted Answer

Russia — India-Russia joint venture. Supersonic cruise missile.‌​‍

Answer

USA

Answer

France

Answer

Israel

Question 6

Kerala State Election Commission:

Accepted Answer

Statutory for local bodies — Conducts local body elections.

Answer

Judicial

Answer

Political

Answer

None

Question 7

Nilambur teak plantations, the oldest teak plantations in the world, are in:‌​‍

Accepted Answer

Malappuram — The Nilambur teak plantations in Malappuram, established in 1842, are considered the oldest teak plantations in the world.‌​‍

Answer

Wayanad

Answer

Palakkad

Answer

Kozhikode

Question 8

A teacher wants to create an online assessment that provides immediate feedback to students upon submission and automatically grades their multiple-choice and short-answer responses. Which ICT tool or platform would be most suitable for this specific requirement?

Accepted Answer

C. Google Forms or similar online quiz maker — Online quiz makers like Google Forms are specifically designed for creating interactive assessments that can provide instant feedback and automate grading, saving significant time for the teacher. Word processors, presentation software, and spreadsheets are not primarily built for this kind of automated, interactive assessment.

Answer

A. Microsoft Word for creating a document

Answer

B. Microsoft PowerPoint for a presentation

Answer

D. Microsoft Excel for data entry

Question 9

Which of the following is a key function of HDL (High-Density Lipoprotein) in lipid metabolism?

Accepted Answer

B. It delivers cholesterol from peripheral tissues back to the liver for excretion — HDL functions in reverse cholesterol transport, delivering excess cholesterol from peripheral tissues back to the liver for excretion, which is protective against atherosclerosis. LDL primarily carries cholesterol from the liver to tissues, while chylomicrons transport dietary lipids.

Answer

A. It transports dietary lipids from the intestine to peripheral tissues

Answer

C. It is the primary carrier of triglycerides in fasting plasma

Answer

D. It is synthesized in the intestinal mucosa and released into the bloodstream

Question 10

Which of the following transmits Dengue?‌​‍

Accepted Answer

Aedes mosquito — Dengue is transmitted by Aedes aegypti mosquito. ‌​‍It bites mainly during daytime.

Answer

Anopheles mosquito

Answer

Housefly

Answer

Rat

DCOA Mixed Practice Test #398