DCOA Mixed Practice Test #302

Question 1

Kerala's 1st film studio:‌​‍

Accepted Answer

Udaya — Udaya Studios.‌​‍

Answer

Punalur

Answer

Chitranjali

Answer

Merryland

Question 2

X-rays were discovered by:‌​‍

Accepted Answer

Roentgen — Wilhelm Roentgen discovered X-rays in 1895. ‌​‍He won the first Nobel Prize in Physics (1901).

Answer

Marie Curie

Answer

Becquerel

Answer

Rutherford

Question 3

The structure of DNA (double helix) was proposed by:

Accepted Answer

Watson and Crick — James Watson and Francis Crick (1953) proposed the double-helix model with Rosalind Franklin's X-ray data.

Answer

Mendel

Answer

Darwin

Answer

Pasteur

Question 4

Who introduced the '@' symbol in email?‌​‍

Accepted Answer

Ray Tomlinson — Ray Tomlinson introduced the @ symbol in email addresses in 1971. ‌​‍He is credited with inventing network email.

Answer

Tim Berners-Lee

Answer

Bill Gates

Answer

Larry Page

Question 5

Hershey-Chase experiment (1952):‌​‍

Accepted Answer

Proved proteins are genetic material — ³²P labeled DNA; ³⁵S labeled protein. ‌​‍Only ³²P entered bacterial host — DNA transmits heredity.

Answer

Proved DNA is genetic material (using T2 phage and ³⁵S/³²P labeling)

Answer

Proved RNA

Answer

No conclusion

Question 6

Doordarshan began:‌​‍

Accepted Answer

15 Sept 1959 — Experimental in Delhi. ‌​‍Colour 1982 (Asian Games). Liberalisation opened private satellite TV (1991-92). ‌​‍Now DD Free Dish.

Answer

1947

Answer

2000

Answer

1991

Question 7

Consumer Protection Act of India:‌​‍

Accepted Answer

1986, revised 2019 — Six consumer rights: safety, information, choice, redressal, consumer education, be heard. ‌​‍2019 Act adds e-commerce, product liability.

Answer

1991

Answer

2015

Answer

1947

Question 8

The ecological term for all living organisms in a given area is:

Accepted Answer

Community — Community = all species in an area; ecosystem adds abiotic components; biome = broad climate-based region.

Answer

Biome

Answer

Biosphere

Answer

Population

Question 9

Which was the first poem written by Pandit K.P. Karuppan?‌​‍

Accepted Answer

Lankamardanam — Lankamardanam — Karuppan's first poem.‌​‍

Answer

Udayanavirunnu

Answer

Sthothramandaram

Answer

Jathikummi

Question 10

A teacher frequently uses rewards like stickers, extra play time, and public praise for every small achievement in class. While initially effective, some students seem to lose interest in tasks once the rewards are no longer offered. This phenomenon is best explained by the potential for excessive extrinsic motivation to:

Accepted Answer

B. Undermine intrinsic motivation by shifting focus to external rewards. — Over-reliance on extrinsic rewards can sometimes diminish a student's intrinsic motivation. When the primary motivator becomes the external reward rather than the inherent enjoyment or challenge of the task, the activity loses its appeal once the reward is removed, thus undermining internal drive.

Answer

A. Enhance intrinsic motivation by building confidence.

Answer

C. Foster a stronger sense of self-actualization among students.

Answer

D. Create a competitive learning environment that benefits all students.

DCOA Mixed Practice Test #302