Class XI & XII · Biology practice

Zoology PYQs

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407 questions in this collection · Page 25 of 41

Question 241 of 407

🟢 NEET (Oct)2020 📘 CLASS XII

Microbes In Human Welfare

For the commercial and industrial production of Citric Acid, which of the following microbes is used?

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Question 242 of 407

🟢 NEET (Oct)2020 📘 CLASS XII

Biotechnology Principles And Processes

Spooling is:

AI-generated explanation. Check against your textbook.

Explanation:

Spooling refers to gathering or collecting the isolated DNA strands after extraction, i.e., the DNA that has been purified is spooled around a rod or stick. This is the collection step of DNA isolation. Hence, option 4 is correct.

🧠 Did You Know?

In labs, DNA can appear as a white, cottony mass that can be wound or spooled on a glass rod when it precipitates out of solution.

💡 NCERT Memory Line:

Spooling = collection of isolated DNA during isolation procedures.

Question 243 of 407

🟢 NEET (Sept)2020 📘 CLASS XII

Biotechnology Principles And Processes

The sequence that controls the copy number of the linked DNA in the vector, is termed:

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Question 244 of 407

🟢 NEET 2019 📘 CLASS XI

Animal Kingdom

Match the following organisms with their respective characteristics:

(A)Pila	(I)Flame cells
(B)Bombyx	(II)Comb plates
(C)Pleurobrachia	(III)Radula
(D)Taenia	(IV)Malpighian tubules

Select the correct option from the following:

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Question 245 of 407

🟢 NEET 2019 📘 CLASS XI

Animal Kingdom

Consider following features:
(A) Organ system level of organisation
(B) Bilateral symmetry
(C) True coelomates with segmentation of body
Select the correct option of animal groups which possess all the above characteristics.

AI-generated explanation. Check against your textbook.

Explanation:

The correct option is 2: Annelida, Arthropoda and Chordata. All three groups show organ system level of organisation and bilateral symmetry. They are true coelomates and exhibit body segmentation (Annelida and Arthropoda are clearly segmented;Chordata shows segmentation in its body plan, such as somites in many groups). Thus they possess all the features listed: organ-system level, bilateral symmetry, and true coelomate with segmentation.

🧠 Did You Know?

While Mollusca are bilaterally symmetrical and coelomate with organ systems, they are not typically described as having true body segmentation like Annelids or Arthropods in the NCERT context.

💡 NCERT Memory Line:

Organ system level, bilateral symmetry, and true coelom with segmentation are characteristic of Annelida and Arthropoda; Chordata also shows segmentation in its body plan.

Question 246 of 407

🟢 NEET 2019 📘 CLASS XI

Structural Organisation In Animals

The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in:

AI-generated explanation. Check against your textbook.

Explanation:

Ciliated epithelial cells help move mucus or particles in a fixed direction. In humans, these ciliated cells line the bronchioles, helping clear inhaled dust, and the Fallopian tubes, helping move the egg towards the uterus. Thus, option 1 (Bronchioles and Fallopian tubes) is correct according to NCERT concepts about ciliated lining in these organs.

🧠 Did You Know?

In the respiratory tract, cilia beat together to push mucus upward toward the throat, a process called mucociliary clearance.

💡 NCERT Memory Line:

Ciliated epithelium is present in the Fallopian tubes and in the bronchi/bronchioles, aiding movement of cells or mucus in a specific direction.

Question 247 of 407

🟢 NEET 2019 📘 CLASS XI

Structural Organisation In Animals

Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth:

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Question 248 of 407

🟢 NEET 2019 📘 CLASS XI

Digestion And Absorption

Match the following structures with their respective location in organs:

Column-I	Column-II
(A)Crypts of Lieberkuhn	(I)Pancreas
(B)Glisson's Capsule	(II)Duodenum
(C)Islets of Langerhans	(III)Small intestine
(D)Brunner's Glands	(IV)Liver

Select the correct option from the following:

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Question 249 of 407

🟢 NEET 2019 📘 CLASS XI

Digestion And Absorption

Identify the cells whose secretion protects the lining of gastro-intestinal tract from various enzymes:

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Question 250 of 407

🟢 NEET 2019 📘 CLASS XI

Breathing And Exchange Of Gases

Tidal Volume and Expiratory Reserve Volume of an athlete is 500 mL and 1000 mL respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL?

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Explanation:

Expiratory capacity (EC) is the total amount of air that can be expired after a normal breath, i.e., EC = Tidal Volume (TV) + Expiratory Reserve Volume (ERV). Here TV = 500 mL and ERV = 1000 mL, so EC = 500 + 1000 = 1500 mL. Residual Volume is not used in EC calculation.

🧠 Did You Know?

EC does not include RV; it only sums the air that can be forcefully expired after a normal breath.

💡 NCERT Memory Line:

EC = TV + ERV; TLC = IRV + TV + ERV + RV; VC = TV + IRV + ERV.

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