Biology Questions

Q:

A protein is synthesized in the endoplasmic reticulum bound ribosomes and it targets to the inner thylakoid space of chloroplast. How many double-layered membrane layers it has to pass to reach its destination?

A) 2 B) 3
C) 4 D) 5
 
Answer & Explanation Answer: B) 3

Explanation:

There are 3 double-layered membrane layers, which the protein has to pass to reach its destination.

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Q:

Which organelles are unique to plant cells?

A) Central vacuole B) Chlorophyll
C) Cell wall D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:
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Q:

Increasing the Alveolar ventilation rate will

A) Increase the rate of carbon dioxide diffusion from the blood to the alveoli B) Decrease the partial pressure of oxygen in the alveoli
C) Increase the partial pressure of carbon dioxide in the alveoli D) Have no effect on either partial pressure or diffusion rate of gases
 
Answer & Explanation Answer: A) Increase the rate of carbon dioxide diffusion from the blood to the alveoli

Explanation:

Increasing the Alveolar ventilation rate will increase the rate of carbon dioxide diffusion from the blood to the alveoli.

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Q:

Which tissue makes the plant hard and stiff?

A) Parenchyma B) Sclerenchyma
C) Collenchyma D) Xylem
 
Answer & Explanation Answer: B) Sclerenchyma

Explanation:
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Q:

In most green plants, chloroplasts are

 

A) concentrated in a zone of leaf tissue called the mesophyll B) concentrated in a portion of the leaf called the stroma
C) found throughout the leaf tissue D) concentrated in the stomata
 
Answer & Explanation Answer: A) concentrated in a zone of leaf tissue called the mesophyll

Explanation:
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Q:

Non-Gonococcal Urethritis is most often caused by

A) chlamydia B) gonorrhea
C) progesterone D) herpes genitalis
 
Answer & Explanation Answer: A) chlamydia

Explanation:

Chlamydial infection is very common in both males and females.

 

NGU (Non-Gonococcal Urethritis) is an infection of the urethra caused by pathogens (germs) other than gonorrhea.

 

Several types of germs cause NGU. The most common and serious is chlamydia.

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Q:

Innate immune system defenses include

A) phagocytosis B) B cells
C) plasma cells D) T cells
 
Answer & Explanation Answer: A) phagocytosis

Explanation:
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Q:

Which one of the following pairs about organ/part that helps in locomotion is not correctly matched?

A) Euglena : Flagellum B) Paramecium : Cilia
C) Nereis : Pseudopodia D) Starfish : Tubefeet
 
Answer & Explanation Answer: C) Nereis : Pseudopodia

Explanation:

Euglena move by a flagellum (plural ‚ flagella), which is a long whip-like structure that acts like a little motor.

The paramecium uses its cilia to sweep the food along with some water into the cell mouth after it falls into the oral groove.

The underside of the starfish is covered with hundreds of tube feet, which it uses for walking around, for attaching tightly to rocks, and for holding on to prey.

Nereis possess setae and parapodia for locomotion

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