Every Book Back multiple-choice question from Transportation in Plants and Circulation in Animals (10th Standard Science, Samacheer Kalvi) — each with the correct option highlighted and a clear, worked explanation. Free to read in English and Tamil.
Q1
Active transport involves
- A. movement of molecules from lower to higher concentration
- B. expenditure of energy
- C. it is an uphill task
- D. all of the aboveCorrect
Explanation. Active transport moves substances against a concentration gradient from lower to higher concentration using cellular energy, making it an uphill process. Therefore, all the listed statements accurately describe active transport.
Q2
Water which is absorbed by roots is transported to aerial parts of the plant through
- A. cortex
- B. epidermis
- C. phloem
- D. xylemCorrect
Explanation. Xylem is the specialized vascular tissue responsible for conducting water and dissolved mineral nutrients from the roots upward to the aerial parts of the plant.
Q3
During transpiration there is loss of
- A. carbon dioxide
- B. oxygen
- C. waterCorrect
- D. none of the above
Explanation. Transpiration is the biological process by which plants lose excess water in the form of water vapor through small openings called stomata on their leaves.
Q4
Root hairs are
- A. cortical cell
- B. projection of epidermal cell
- C. unicellular
- D. both b and cCorrect
Explanation. Root hairs are slender, unicellular extensions formed by the outer epidermal cells of the root, which significantly increase the surface area available for absorbing water and minerals.
Q5
Which of the following process requires energy?
- A. active transportCorrect
- B. diffusion
- C. osmosis
- D. all of them
Explanation. Active transport requires cellular energy to move molecules across cell membranes against their concentration gradient, whereas diffusion and osmosis are passive transport mechanisms that occur spontaneously without energy expenditure.
Q6
The wall of human heart is made of
- A. Endocardium
- B. Epicardium
- C. Myocardium
- D. All of the aboveCorrect
Explanation. The cardiac wall comprises three distinct tissue layers: the outer epicardium, the middle muscular myocardium, and the inner endocardium. Thus, all three options collectively form the heart wall.
Q7
Which is the correct sequence of blood flow
- A. ventricle -> atrium -> vein -> arteries
- B. atrium -> ventricle -> veins -> arteries
- C. atrium -> ventricle -> arteries -> veinCorrect
- D. ventricles -> vein -> atrium -> arteries
Explanation. Blood enters the heart at the atrium, moves into the ventricle, is pumped out through arteries to the tissues, and returns to the heart via veins.
Q8
A patient with blood group O was injured in an accident and has blood loss. Which group of blood should be used by doctor for transfusion?
- A. O groupCorrect
- B. AB group
- C. A or B group
- D. all blood group
Explanation. Individuals with blood group O possess antibodies against both A and B antigens in their plasma. Consequently, they can safely receive red blood cells only from donors with O group blood.
Q9
'Heart of heart' is called
- A. SA nodeCorrect
- B. AV node
- C. Purkinje fibres
- D. Bundle of His
Explanation. The sinoatrial (SA) node is known as the pacemaker or 'heart of heart' because it spontaneously generates rhythmic electrical impulses that initiate and maintain the heartbeat.
Q10
Which one of the following shows correct composition of blood
- A. Plasma - Blood + Lymphocyte
- B. Serum - Blood + Fibrinogen
- C. Lymph - Plasma + RBC + WBC
- D. Blood - Plasma + RBC+ WBC +PlateletsCorrect
Explanation. Blood is a fluid connective tissue composed of liquid plasma and cellular formed elements, which include red blood cells, white blood cells, and blood platelets.
About these Transportation in Plants and Circulation in Animals questions
These are the Book Back multiple-choice questions for Transportation in Plants and Circulation in Animals from the Tamil Nadu State Board (Samacheer Kalvi) 10th Standard Science syllabus. Each question shows the correct option and an original, step-by-step explanation so you understand the method, not just the answer. Use the answer key above to jump to any question, then take the practice test to check yourself under exam-like conditions.
Frequently asked questions
How many MCQs are there in Transportation in Plants and Circulation in Animals?
This chapter has 10 book-back multiple-choice questions, each with the correct answer and a step-by-step explanation.
Are these 10th Standard Science MCQs free to practise online?
Yes. Every question, answer and explanation here is free, and you can also take them as a timed practice test.
Where can I find the Transportation in Plants and Circulation in Animals book-back answers?
The correct option for each question is highlighted on this page with a worked explanation, plus a quick answer-key summary at the top.
