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Q:

Persons with which blood group are called universal donors?

A) AB B) A
C) O D) B

Answer:   C) O



Explanation:
Subject: General Science
Q:

Which of the following is a characteristic of all minerals?

A) Crystalline solids B) Minerals are inorganic
C) All minerals are formed in a natural process D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

Common properties of Minerals are :

 

1. All minerals are formed in a natural process.

2. Minerals are inorganic

3. Minerals are crystalline solids.

4. Every mineral is an element or compound with a definite chemical composition.

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Q:

Did mercury cure syphilis?

Answer

Mercury was the remedy of choice for syphilis in Protestant Europe. Until the early 20th century, the primary treatment for syphilis was mercury, in the form of calomel, ointments, steam baths, pills, and other concoctions.


Mercury was already being used in Western Europe to treat skin diseases.

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Q:

Which of these is a starting point for primary succession?

A) a neglected yard B) a surface exposed by a retreating glacier
C) an abandoned city D) abandoned farmland
 
Answer & Explanation Answer: B) a surface exposed by a retreating glacier

Explanation:
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Q:

What are the sides of the dna ladder made of

A) nitrates and sugars B) sugars and hydrates
C) sugars and phosphates D) phosphates and nitrates
 
Answer & Explanation Answer: C) sugars and phosphates

Explanation:

DNA is a double-stranded molecule twisted into a helix. The shape of DNA is a double helix, which is like a twisted ladder. The sides of the ladder are made of alternating sugar and phosphate molecules. Deoxyribose, which is a pentose, and a phosphate group are the two molecules together form the two sides of the DNA. The rungs of the ladder are pairs of 4 types of nitrogen bases.

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2 15
Q:

Which of these provides your body with energy?

A) Carbohydrates B) Fats
C) Vitamins D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

Nutrients are the substances in food that provide the raw materials and energy the body needs to carry out all its essential processes.

There are six groups of nutrients:

1. Carbohydrates.

2. Fats.

3. Proteins.

4. Vitamins.

5. Minerals.

6. Water.

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Q:

What occurs during the digestion of protein?

A) Specific hormones breakdown proteins into simple sugars B) Specific enzymes breakdown proteins into simple sugars
C) Specific hormones breakdown proteins into complex starches D) Specific enzymes breakdown proteins into amino acids
 
Answer & Explanation Answer: D) Specific enzymes breakdown proteins into amino acids

Explanation:

Protein digestion occurs in the stomach and duodenum in which 3 main enzymes:

 

1. Pepsin secreted by the stomach 

2. Trypsin and

3. Chymotrypsin secreted by the pancreas

 

Break down food proteins into polypeptides that are then broken down by various exopeptidases and dipeptidases into amino acids.

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Q:

Valve between the left ventricle and Aorta?

A) Pulmonic valve B) Tricuspid valve
C) Aortic valve D) Mitral valve
 
Answer & Explanation Answer: C) Aortic valve

Explanation:

The Aortic valve - located between the left ventricle and the aorta

The Mitral valve - located between the left atrium and left ventricle

The Tricuspid valve - located between the right atrium and the right ventricle (and) 

The Pulmonary (pulmonic) valve - located between the right ventricle and the pulmonary artery.

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Q:

The term metabolism is best defined as

A) the number of calories it takes to keep from shivering on a cold day B) biochemical reactions involved in building cell molecules or breaking down molecules for energy
C) the length of time it takes to digest and absorb fats D) a measure of carbohydrate utilization, typically involving measurement of calories
 
Answer & Explanation Answer: B) biochemical reactions involved in building cell molecules or breaking down molecules for energy

Explanation:

Metabolism (from Greek: μεταβολή metabolē, "change") is the set of life-sustaining chemical transformations within the cells of organisms. The three main purposes of metabolism are the conversion of food/fuel to energy to run cellular processes, the conversion of food/fuel to building blocks for proteins, lipids, nucleic acids, and some carbohydrates, and the elimination of nitrogenous wastes.


In brief, the chemical processes that occur within a living organism in order to maintain life is called metabolism.

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