LGS Mixed Practice Test #730

Question 1

The part of the eye that regulates the amount of light entering is the:

Accepted Answer

Iris (with pupil) — The iris (coloured ring) controls pupil size — dilates in dim light, constricts in bright.

Answer

Retina

Answer

Cornea

Answer

Lens

Question 2

The term 'hat-trick' originated from:‌​‍

Accepted Answer

Cricket — Hat-trick originated in cricket — a bowler taking 3 wickets in 3 consecutive balls. ‌​‍Now used across sports.

Answer

Football

Answer

Hockey

Answer

Tennis

Question 3

The Central Himalayas are also known as:

Accepted Answer

Nepal Himalayas — Central Himalayas lie mostly in Nepal — hence Nepal Himalayas.

Answer

Kashmir Himalayas

Answer

Assam Himalayas

Answer

Kumaon Himalayas

Question 4

Which of the following is the primary purpose of incorporating formative assessment strategies in classroom teaching?

Accepted Answer

C. To provide ongoing feedback to students and adjust instruction to improve learning. — The core purpose of formative assessment is to 'assess for learning.' It focuses on providing timely and specific feedback to students about their progress and allowing teachers to modify their teaching strategies to better meet student needs. Options A, B, and D describe purposes more aligned with summative or norm-referenced assessments, not formative.

Answer

A. To assign final grades at the end of a course.

Answer

B. To compare student performance with a national standard.

Answer

D. To rank students based on their performance for competitive selection.

Question 5

Human digestive enzyme that breaks starch into maltose in mouth:

Accepted Answer

Salivary amylase (ptyalin) — Optimum pH 6.8. Inactivated in stomach's acidic environment. Pancreatic amylase continues digestion in duodenum.

Answer

Pepsin

Answer

Lipase

Answer

Trypsin

Question 6

What did the Miller-Urey experiment (1953) demonstrate?‌​‍

Accepted Answer

Abiotic synthesis of amino acids from inorganic gases — NH₃, CH₄, H₂, H₂O + spark → amino acids. ‌​‍Supports Oparin-Haldane hypothesis of chemical evolution.

Answer

Antibiotics

Answer

DNA structure

Answer

Cloning

Question 7

Which 'tinai' in ancient Tamil Sangam literature represents the coastal region?‌​‍

Accepted Answer

Neithal — Neithal represents the coastal / sea landscape in the five tinais.‌​‍

Answer

Kurunji

Answer

Mullai

Answer

Palai

Question 8

Algae characteristic: store food as:

Accepted Answer

Starch, oils — Green algae (Chlorophyceae) — starch. Brown (Phaeophyceae) — laminarin. Red (Rhodophyceae) — floridean starch.

Answer

Glycogen only

Answer

Protein

Answer

Lipids only

Question 9

Study of women's reproductive health:‌​‍

Accepted Answer

Gynaecology — Gynaecology.‌​‍

Answer

Paediatrics

Answer

Obstetrics

Answer

Andrology

Question 10

A teacher observes that students are distracted during lessons. What is the most effective way to regain their attention?

Accepted Answer

B. Using a non-verbal cue like raising a hand or turning off lights to signal attention — Non-verbal cues (Option B) are subtle, respectful, and effective in regaining attention without disrupting the lesson. Continuing without intervention (Option A) may worsen distraction, calling out names (Option C) can embarrass students, and unrelated questions (Option D) waste instructional time.

Answer

A. Continuing the lesson without interruption to maintain flow

Answer

C. Calling out the names of distracted students to bring them back on track

Answer

D. Pausing the lesson and asking a trivia question unrelated to the topic

LGS Mixed Practice Test #730