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Q:

Which discovery is attributed to Phoebus Levene?

A) identification of ribose and deoxyribose	B) recognition of RNA as DNA’s messenger
C) extraction and observation of DNA	D) construction of an accurate DNA model

Answer & Explanation Answer: A) identification of ribose and deoxyribose

Explanation:

Phoebus Levene was an organic chemist in the early 1900's. He is perhaps best known for his incorrect tetranucleotide hypothesis of DNA. He is who studied the structure and function of nucleic acids.

The discovery of Identification of Ribose and Deoxyribose is attributed to Phoebus Levene.

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Q:

Whose teachings did the pilgrims follow?

Answer

The pilgrims follow John Calvin's teachings.

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Q:

Main street high school has 10 members on its football team and 14 members on its science club. 5 members at the school belong to both the football and science teams. How many students belong to only science club team or football team?

A) 9	B) 14
C) 24	D) 21

Answer & Explanation Answer: A) 9

Explanation:

Given that,

Members in football team = n(f) = 10

Members in science club = n(s) = 14

Members in both football team and science club = n(f ^ s) = 5

Then, Members in only football team = n(F) = 10 - 5 = 5

Members in only science team = n(S) = 14 - 5 = 9

football_science_teams1533013879.jpg image

Hence, members in only football or science team = n(FUS) = n(F) + n(S) - n(f^s)

= 9 + 5 - 5

= 9.

Hence, many students belong to only science club team or football team = 9.

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Q:

Who propounded 'Deen-E-Llahi'?

A) Jahangir	B) Akbar
C) Shah Jahan	D) Humayun

Answer & Explanation Answer: B) Akbar

Explanation:

Mughal emperor, Abu'l-Fath Jalal ud-din Muhammad Akbar popularly known as Akbar propounded a syncretic religion called 'Din-i-ilahi' which literally means that "Religion of God".

akbar1533011882.jpg image

His intention in propounding this religion is to merge the best elements of the religions of his empire, and thereby reconcile the differences that divided his subjects.

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Q:

Which of the following is true of kinetochores?

A) They are the primary centrosome structures that maintain the attachment of the sister chromatids prior to mitosis.	B) They are the sites at which microtubules attach to chromosomes.
C) They are located at the center of the centrosome and organize tubulin into spindle fibers.	D) They cross at the cell's equator and move against each other, causing the cell to elongate.

Answer & Explanation Answer: B) They are the sites at which microtubules attach to chromosomes.

Explanation:

They are the sites at which microtubules attach to chromosomes.

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Q:

The ages of Sunitha and Pranitha are 40 years and 60 years, respectively. How many years before the ratio of their ages was 3 : 5?

A) 10 years	B) 15 years
C) 18 years	D) 24 years

Answer & Explanation Answer: A) 10 years

Explanation:

Given the ages of Sunitha and Pranitha are 40 years and 60 years.

Let before 'm' years, their ages be in the ratio of 3 : 5

ATQ,

$\frac{40 - m}{60 - m} = \frac{3}{5}$

=> 200 - 5m = 180 - 3m

=>2m = 20

=> m = 10 years.

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Q:

How many window coverings are necessary to span 50 windows, if each window covering is 15 windows long?

A) 4	B) 15
C) 3	D) 50

Answer & Explanation Answer: A) 4

Explanation:

Given that,

Number of windows = 50

Each window covering covers 15 windows

=> 50 windows requires 50/15 window coverings

= 50/15 = 3.333

Hence, more than 3 window coverings are required. In the options 4 is more than 3.

Hence, 4 window coverings are required to cover 50 windows of each covering covers 15 windows.

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Q:

Photosynthesis contributes to plant growth by

A) taking in carbon dioxide and making carbohydrates (sugars)	B) converting sugar to oxygen and water
C) taking in oxygen and making wood	D) synthesizing carbon dioxide and making cellulose

Answer & Explanation Answer: A) taking in carbon dioxide and making carbohydrates (sugars)

Explanation:

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms activities.

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