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Q:

The temperature danger zone for food is

A) 5 - 63 deg B) above 45 deg
C) below 15 deg D) None of the above
 
Answer & Explanation Answer: A) 5 - 63 deg

Explanation:

The temperature danger zone for the food that cannot be stored for long time is between 5 degrees to 63 degrees centigrade.

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Filed Under: Biology
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Q:

The missing number in the series 9 81 ? 6561 59049

A) 729 B) 3561
C) 4213 D) None of the above
 
Answer & Explanation Answer: A) 729

Explanation:

The given series is 9 81 ? 6561 59049

It follows a pattern that

 

9

81 = 9 x 9

729 = 9 x 9 x 9

6561 = 9 x 9 x 9 x 9

59049 = 9 x 9 x 9 x 9 x 9

 

Hence, the missing number in the series is 729.

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Filed Under: Number Series
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Q:

The mass of a mole of NaCl is the

A) 58.44 gm/mol B) 57.25 gm/mol
C) 56.31 gm/mol D) 59.14 gm/mol
 
Answer & Explanation Answer: A) 58.44 gm/mol

Explanation:

To get the mass of a mole of NaCl, we need to add the molar atomic weights of the individual elements i.e, Na and Cl

Atomic weights of Na = 22.99 gm/mol  Cl = 35.45 gm/mol

 

Now, mass of a mole of NaCl = 22.99 + 35.45 = 58.44 gm/mol.

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Filed Under: Chemistry
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Q:

Which RNA base pairs with the adenine in DNA?

A) Thymine B) Cytosine
C) Both A & B D) Uracil
 
Answer & Explanation Answer: D) Uracil

Explanation:

In DNA, adenine pairs with Thymine. Similarly, in RNA, due to absence of thymine in RNA and the same structure with uracil helps to pair with adenine.

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Filed Under: Biology
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Q:

When an account becomes uncollectible and must be written off

A) Accounts Receivable should be credited B) Sales Revenue should be debited
C) Allowance for Doubtful Accounts should be credited D) Bad Debt Expense should be credited
 
Answer & Explanation Answer: A) Accounts Receivable should be credited

Explanation:
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Filed Under: Accounts Receivable
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Q:

The two major types of computer chips are

A) Microprocessor B) Primary memory
C) Both A & B D) External memory
 
Answer & Explanation Answer: C) Both A & B

Explanation:

The two major types of computer chips are Microprocessor and Primary memory chips.

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Filed Under: Computer
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Q:

A by product of involuntary muscle contraction and relaxation is

A) Oxygen B) Water
C) Heat D) Nitrogen
 
Answer & Explanation Answer: C) Heat

Explanation:

A_by_product_of_involuntary_muscle_contraction_and_relaxation_is1537166589.jpg image

When a muscle is contracted and relaxed some amount of heat is released as a by product. 

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Filed Under: Chemistry
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Q:

Land is considered a resource because it

A) is used to produce things B) requires labor to be useful
C) is always available to use D) costs little or nothing to use
 
Answer & Explanation Answer: A) is used to produce things

Explanation:

Land is considered as an important resource because it is useful in producing many things. For example, in agriculture, land is used for cultivating the crop, in industrial use, it is used for constructing factories and to make products that we use.

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Filed Under: Physics
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