Biology Questions

Q:

What is the unit of heredity?

A) cell B) blood
C) gene D) All of the above
 
Answer & Explanation Answer: C) gene

Explanation:

Genes are units of heredity.

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Q:

Hypnosis is sometimes used to treat anxiety disorders.

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

Hypnosis is a state of human consciousness involving focused attention, reduced peripheral awareness, and an enhanced capacity to respond to suggestion.

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Q:

Metastasis is the process by which _________

A) Cell divide rapidly under the influence of drugs B) Cancer cell spread through the blood or lymphatic system to other site or organs
C) The Chromosome in cell nuclei are attached to the soindle before moving to the anaphase poles D) Cancer cells are successfully inhibited to divide any further
 
Answer & Explanation Answer: B) Cancer cell spread through the blood or lymphatic system to other site or organs

Explanation:
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Q:

Sugar is a component of which of the following?

A) Lipids B) Nucleic acids
C) Carbohydrates D) Both B & C
 
Answer & Explanation Answer: C) Carbohydrates

Explanation:

Sugar is a component of Carbohydrates.

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Q:

Which parts of the heart receive blood from the lungs?

A) Right ventricle B) Left Atrium
C) Left Ventricle D) Right ATrium
 
Answer & Explanation Answer: B) Left Atrium

Explanation:

The left atrium is the upper left chamber of the heart that receives blood from the pulmonary veins.

 

which_parts_of_the_heart_receive_blood_from_the_lungs1561113684.jpg image

 

The heart is responsible for circulating blood throughout the body. The heart is divided into four chambers. The upper chamber is known as the atrium while the lower chamber is referred to as the ventricle.

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Q:

What do genes code for?

A) Ptoteins B) DNA
C) RNA D) None
 
Answer & Explanation Answer: A) Ptoteins

Explanation:

The genome of an organism is inscribed in DNA, or in some viruses RNA. The portion of the genome that codes for a protein or an RNA is referred to as a gene. Those genes that code for proteins are composed of tri-nucleotide units called codons, each coding for a single amino acid.

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Q:

In plants, chloroplasts are necessary for 

A) photosynthesis B) storage
C) cell movement D) respiration
 
Answer & Explanation Answer: A) photosynthesis

Explanation:

Plants are producers, which means they make their own food. Chloroplasts are organelles found in eukaryotic and plant cells that conduct photosynthesis. Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant.

Plants use energy from sunlight to help make their food, but they need chloroplasts to do it.

 

Hence, in plants, chloroplasts are necessary for Photosynthesis.

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Q:

Which of the following is true of enzymes?

A) Enzymes lowers the activation energy for the chemical reaction B) Enzymes speed up the rate of a chemical reaction
C) Both A & B D) Neither A nor B
 
Answer & Explanation Answer: C) Both A & B

Explanation:

Enzymes are macromolecular biological catalysts. Enzymes accelerate chemical reactions. The molecules upon which enzymes may act are called substrates and the enzyme converts the substrates into different molecules known as products.

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