VFA Mixed Practice Test #172

Question 1

Which of the following is the primary mineral responsible for the red colour of laterite soil found in Kerala?

Accepted Answer

A. Iron oxide — Laterite soil derives its characteristic red colour from the high concentration of iron oxide (Fe2O3), which is a result of intense weathering and leaching in tropical climates. Aluminium oxide is present but does not impart the red colour; calcium carbonate and potassium feldspar are not primary contributors to this soil type.

Answer

B. Aluminium oxide

Answer

C. Calcium carbonate

Answer

D. Potassium feldspar

Question 2

The Meghalaya 'root bridges' are made by:

Accepted Answer

Local Khasi and Jaintia tribes using living ficus roots — Living root bridges are woven from Ficus elastica roots by Khasi/Jaintia tribes.

Answer

Colonial British engineers

Answer

Modern civil engineers

Answer

Natural growth without human intervention

Question 3

Fluoroquinolone antibiotics, such as ciprofloxacin, exert their bactericidal effect primarily by inhibiting which bacterial enzyme?

Accepted Answer

C. DNA gyrase (topoisomerase II) and topoisomerase IV — Fluoroquinolones are bactericidal antibiotics that inhibit bacterial DNA gyrase (topoisomerase II) and topoisomerase IV. These enzymes are crucial for bacterial DNA replication, transcription, repair, and recombination, thus preventing bacterial growth and division.

Answer

A. Peptidoglycan transpeptidase

Answer

B. Dihydrofolate reductase

Answer

D. Ribosomal 50S subunit

Question 4

Following the formation of the first elected government in Kerala in 1957, significant policy changes were introduced, particularly impacting the education sector. Who served as the inaugural Education Minister of Kerala, playing a crucial role in shaping the state's educational policies during this transformative period?

Accepted Answer

C. Joseph Mundassery — Joseph Mundassery was the first Education Minister of Kerala in the first elected Communist government led by E. M. S. Namboodiripad. He was instrumental in introducing the controversial Education Bill of 1957, which aimed to regulate private educational institutions and improve the service conditions of teachers, significantly impacting the state's education system.

Answer

A. C. Achutha Menon

Answer

B. E. M. S. Namboodiripad

Answer

D. K. R. Gouri Amma

Question 5

The river on which Idukki Dam is built:‌​‍

Accepted Answer

Periyar — Idukki Dam is on the Periyar River in Idukki district. ‌​‍It is one of the highest arch dams in Asia.

Answer

Pamba

Answer

Chaliyar

Answer

Bharathapuzha

Question 6

Flipkart founders:‌​‍

Accepted Answer

Sachin and Binny Bansal — Bansal pair.‌​‍

Answer

Bhavish

Answer

Others

Answer

VSS

Question 7

A drug that structurally resembles the substrate and binds to the active site of an enzyme, preventing the substrate from binding, is an example of what type of inhibition?

Accepted Answer

C. Competitive inhibition — Competitive inhibitors directly compete with the substrate for binding to the enzyme's active site due to their structural similarity. This type of inhibition can often be overcome by increasing the substrate concentration. Non-competitive inhibitors bind to a different site on the enzyme.

Answer

A. Non-competitive inhibition

Answer

B. Uncompetitive inhibition

Answer

D. Irreversible inhibition

Question 8

During a science lesson, a teacher asks students to create a concept map explaining the water cycle and then walks around observing their work, providing immediate verbal feedback and suggestions for improvement. This activity is a prime example of:

Accepted Answer

C. A formative assessment technique. — This scenario perfectly illustrates formative assessment, where the teacher monitors student understanding during the learning process and provides immediate, actionable feedback to guide improvement. Summative assessments typically occur at the end of a learning period for grading, while diagnostic assessments are used before instruction. It is not a standardized test but a classroom-based activity.

Answer

A. A high-stakes summative assessment.

Answer

B. A diagnostic assessment to identify prior knowledge.

Answer

D. A standardized achievement test.

Question 9

Shalabham scheme:‌​‍

Accepted Answer

Kerala students tablet — Government laptop/tablet for students (various years).‌​‍

Answer

Uniform

Answer

Lunch

Answer

Teacher training

Question 10

What is Pulluvan Paattu?‌​‍

Accepted Answer

Serpent worship songs — Serpent songs.‌​‍

Answer

Folk

Answer

Royal

Answer

Religious

VFA Mixed Practice Test #172