Bihar Board Class 10 Science Question Paper 2025 - Download PDF for All Sets

Bihar Board Class 10 Science Paper Solution 2025

Apart from section A objective types of questions, students can also check subjective types of question-answers with solutions here. Very shortly BSEB Bihar board 10th science answer key and solution will be provided here. Some of the questions and answer of Bihar board class 10 science set-E is given below.

1. दोहरा परिसंचरण नहीं पाया जाता है
(A) मेढ़क में
(B) मछली में
(C) पक्षी में
(D) मनुष्य में

Double circulation is not found in
(A) Frog
(B) Fish
(C) Bird
(D) Human

The correct answer is:

(B) Fish

Explanation: Double circulation (where blood passes through the heart twice in one complete cycle) is found in animals like frogs, birds, and humans. However, fish have single circulation, where blood passes through the heart only once in a complete cycle. Therefore, the correct answer is (B) Fish.

2. यूरिया रक्त में कहाँ से प्रवेश करती है ?
(A) वृक्झ से
(B) फेफड़ा से
(C) यकृत से
(D) इनमें से कोई नहीं

From where does urea enter the blood?
(A) Kidney
(B) Lungs
(C) Liver
(D) None of these

(C) Liver

Explanation: Urea is produced in the liver as a result of protein metabolism. It then enters the bloodstream and is transported to the kidneys for excretion. Therefore, the correct answer is (C) Liver.

3. ग्लूकोज का पुनरवशोषण कहाँ होता है ?
(A) PCT में
(B) DCT में
(C) हेनले लूप में
(D) इनमें से सभी

Where does glucose reabsorption occur?
(A) In PCT
(B) In DCT
(C) In Henle's loop
(D) All of these

The correct answer is:

(A) In PCT

Explanation: Glucose reabsorption primarily occurs in the Proximal Convoluted Tubule (PCT) of the nephron in the kidney. The PCT is responsible for reabsorbing most of the filtered glucose back into the bloodstream. Therefore, the correct answer is (A) In PCT.

4. विभिन्न क्रियाओं के फलस्वरूप बने हानिकारक पदार्थों को शरीर से बाहर निकालने के तंत्र को कहते हैं
(A) पाचन तंत्र
(B) परिसंचरण तंत्र
(C) उत्सर्जन तंत्र
(D) तंत्रिका तंत्र

The mechanism for removing harmful substances formed as a result of various activities from the body is called
(A) Digestive system
(B) Circulatory system
(C) Excretory system
(D) Nervous system

The correct answer is:

(C) Excretory system

Explanation: The excretory system (उत्सर्जन तंत्र) is responsible for removing harmful substances and waste products (such as urea, excess salts, and toxins) from the body. Therefore, the correct answer is (C) Excretory system.

5. मेरुजजु के आघात से क्या हो सकता है ?
(A) घेंघा
(B) बौनापन
(C) मधुमेह
(D) लकवा

What can happen due to spinal cord injury?
(A) Goitre
(B) Dwarfism
(C) Diabetes
(D) Paralysis

The correct answer is:

(D) Paralysis

Explanation: A spinal cord injury can disrupt the communication between the brain and the body, leading to paralysis (लकवा) in parts of the body below the injury site. Therefore, the correct answer is (D) Paralysis.

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