Biology Questions

Q:

The later (second) formed primary xylem elements are called _____________.

A) Protoxylem B) Metaxylem
C) Xylem parenchyma D) Xylem fibres
 
Answer & Explanation Answer: B) Metaxylem

Explanation:
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Q:

All of the following are polysaccharides except

A) Chitin B) Lactose
C) Glycogen D) Cellulose
 
Answer & Explanation Answer: B) Lactose

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Q:

Which is a function of a protein macromolecule?

A) Cushions the internal organs of an animal B) Provides the building instructions for living things
C) Makes up the connective tissue in tendons D) Makes the leaves of plants waterproof
 
Answer & Explanation Answer: C) Makes up the connective tissue in tendons

Explanation:

The function of a protein macromolecule is

- Moving things in and out of cells.

- Transporting other molecules in the body.

- Making up the connective tissue in tendons.

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Q:

Part of the plant where photosynthesis generally occurs

A) roots B) leaves
C) branches D) flowers
 
Answer & Explanation Answer: B) leaves

Explanation:

In a plant, photosynthesis generally occurs in the leaves part as leaves have chlorophyll which is used for making food using sunlight.

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Q:

Insulin is a kind of _____

A) hormone B) protein
C) enzyme D) vitamin
 
Answer & Explanation Answer: A) hormone

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Q:

Nodes of Ranvier are microscopic gaps found within:

A) osteoblasts B) gland cells
C) chondroblasts D) myelinated axons
 
Answer & Explanation Answer: D) myelinated axons

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Q:

Animals like annelids and arthropods etc where the body can be divided into identical left and right halves in only one plane, exhibit ________ symmetry.

A) Coelenterata B) Radial
C) Ctenophora D) Bilateral
 
Answer & Explanation Answer: D) Bilateral

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Q:

....... produces a usable form of energy for the cell.

A) Ribosomes B) Plastids
C) Mitochondria D) Chloroplast
 
Answer & Explanation Answer: C) Mitochondria

Explanation:

Mitochondria are organelles that generate most of the chemical energy needed to power the cell's biochemical reactions. Hence, thay are also called as Power house of the cell.

 

mitochondria1593761207.jpg image

 

* Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).

 

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