UPSC CS Main 2021 Zoology Paper II Question Paper PDF

Central Government Jobs Other Jobs 2021

  • Year 2021
  • Conducted By UPSC
  • Questions 8
  • Maximum Marks 250
  • Duration Three Hours
  • Languages Hindi & English

Exam Details

Detail Information
Examination CS (Main) Exam
Year 2021
Conducting Body UPSC
Paper Zoology Paper II
Subject Zoology
Duration Three Hours
Maximum Marks 250
Number of Questions 8
Question Type Descriptive / Subjective

This is the Zoology Paper II from the UPSC CS (Main) Examination held in 2021. The paper carries a maximum of 250 marks and candidates are allowed three hours to complete it. It consists of eight descriptive questions divided into two sections, with specific instructions on attempting a total of five questions, including compulsory ones. This paper is crucial for aspirants aiming to assess their understanding of advanced zoological concepts and their ability to articulate them in a descriptive format.

Major Topics Covered

  • Transcription
  • Gene Concept
  • Allilism
  • Mimicry
  • Animal Taxonomy
  • Molecular Techniques
  • Cladistics
  • Biological Nomenclature
  • Cell Cycle
  • Meiotic Cell Cycle Regulation
  • Lysosomes
  • Glycoproteins
  • Plasma Membrane
  • Chromosome Mutation
  • Polyploidy

Why This Paper is Important

  • Useful for CS (Main) Exam preparation
  • Helps understand the latest exam pattern
  • Useful for practice and self-assessment
  • Covers frequently asked General Studies topics
  • Helpful for analysing question trends

Related Resources

  • UPSC CS (Main) Exam 2021 Zoology Paper I
  • UPSC CS (Main) Exam 2020 Zoology Paper II
  • UPSC CS (Main) Exam 2021 Botany Paper II
  • UPSC CS (Main) Exam 2021 General Studies Paper I
  • UPSC CS Main 2021 Zoology Paper II Answer Key
  • UPSC CS Main Zoology Syllabus
  • UPSC Mains Exam Pattern
  • UPSC Civil Services Syllabus

Instructions

  • पुस्तिका के मुखपृष्ठ पर निर्दिष्ट स्थान पर किया जाना चाहिए ।
  • प्राधिकृत माध्यम के अतिरिक्त अन्य किसी माध्यम में लिखे गए उत्तर पर कोई अंक नहीं मिलेंगे ।
  • जहाँ भी आवश्यक समझा जाए, वहाँ अपने उत्तरों को उपयुक्त रेखाचित्रों एवं आरेखों सहित स्पष्ट कीजिए ।
  • प्रश्नों के प्रयासों की गणना क्रमानुसार की जाएगी ।
  • आंशिक रूप से दिए गए प्रश्नों के उत्तर को भी मान्यता दी जाएगी यदि उसे काटा न गया हो ।
  • प्रश्न-सह-उत्तर पुस्तिका में खाली छोड़े गए कोइ पृष्ठ अथवा पृष्ठ के भाग को पूर्णतः काट दीजिए ।

  • There are EIGHT questions divided in TWO SECTIONS and printed both in HINDI and in ENGLISH.
  • Candidate has to attempt FIVE questions in all.
  • Question Nos. 1 and 5 are compulsory and out of the remaining, THREE are to be attempted choosing at least ONE question from each Section.
  • The number of marks carried by a question/part is indicated against it.
  • Answers must be written in the medium authorized in the Admission Certificate which must be stated clearly on the cover of this Question-cum-Answer (QCA) Booklet in the space provided.
  • No marks will be given for answers written in a medium other than the authorized one.
  • Illustrate your answers with suitable sketches and diagrams, wherever considered necessary.
  • Attempts of questions shall be counted in sequential order.
  • Unless struck off, attempt of a question shall be counted even if attempted partly.
  • Any page or portion of the page left blank in the Question-cum-Answer Booklet must be clearly struck off.

Questions (page 2)

Section A

Q1. Write your answer in about 150 words for each of the following :
निम्नलिखित प्रत्येक के लिये लगभग 150 शब्दों में अपना उत्तर लिखिये :

(a) एक सुकेन्द्रकी (यूकैरियाट) में अनुलेखन की शुरुआत करने में प्रोटीन की आवश्यकता का वर्णन कीजिए ।
Describe the requirement of proteins for the initiation of transcription in an eukaryote.

(b) जीन की आधुनिक अवधारणा क्या है ? विकल्पता (एलिलिज़्म) के परीक्षण का वर्णन उपयुक्त उदाहरण सहित कीजिए ।
What is modern concept of gene? Describe the test of allilism with suitable example.

(c) अनुहरण (मिमिक्री) को परिभाषित कीजिए । उपयुक्त उदाहरणों के साथ मिमिक्री के प्रकारों का वर्णन कीजिए ।
Define mimicry. Discuss the types of mimicry with suitable examples.

(d) जन्तु वर्गिकी में आण्विक तकनीकों के उपयोग का वर्णन कीजिए ।
Describe the use of molecular techniques in animal taxonomy.

(e) वंशशाखिकी (क्लैडिस्टिक्स) क्या है ? जैविक नामपद्धति के अन्तर्राष्ट्रीय कोड का वर्णन कीजिए ।
What is cladistics ? Discuss the international code of biological nomenclature.

Section A

Q2.

(a) कोशिका चक्र क्या है ? कोशिका चक्र के दौरान आण्विक घटनाओं का सिंहावलोकन कीजिए । अर्धसूत्री कोशिका चक्र के नियमन में प्रोटीन काइनेज़ेस की भूमिका का वर्णन कीजिए ।
What is cell cycle ? Draw an overview of molecular events during cell cycle. Discuss the role of protein kinases in the regulation of meiotic cell cycle.

(b) लयनकाय (लाइसोसोम्स) बहुरूपी होते है, सिद्ध कीजिए । लाइसोसोम प्रणाली के गतिशील पहलू को दर्शाते हुए आरेखित कीजिए । लाइसोसोम्स के कार्यों को कलमबंद कीजिए ।
Lysosomes are polymorphic, justify. Draw a diagram representing the dynamic aspect of lysosome system. Write down the functions of lysosomes.

(c) प्रद्रव्य (प्लाज्मा) झिल्ली में ग्लाइकोप्रोटीन असममित रूप से वितरित होते हैं, स्पष्ट कीजिए । झिल्ली के कार्यों का एक सिंहावलोकन प्रस्तुत कीजिए ।
Glycoproteins are asymmetrically distributed in a plasma membrane, explain. Give an overview of membrane function.

Section A

Q3.

(a) गुणसूत्र उत्परिवर्तन क्या है ? विभिन्न प्रकार की बहुगुणिता (पॉलीप्लोइडी) का वर्णन उपयुक्त उदाहरणों के साथ कीजिए । बहुगुणिता के लक्षण प्ररूपी प्रभावों पर एक टिप्पणी भी लिखिए ।
What is chromosome mutation ? Describe various types of polyploidy with suitable examples. Add a note on phenotypic effects of polyploidy.

Question paper preview

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CS Main 2021 Zoology Paper II question paper page 1 instructions scan PDF download UPSC Mains
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CS Main 2021 Zoology Paper II question paper page 1 instructions scan PDF download UPSC Mains

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Frequently asked questions

What is the name of the exam?

The exam is the CS (Main) Exam.

Which year is this question paper from?

This question paper is from the year 2021.

Who conducts the CS (Main) Exam?

The CS (Main) Exam is conducted by UPSC.

What is the subject of this paper?

The subject of this paper is Zoology, specifically Paper II.

What is the maximum marks for Zoology Paper II?

The maximum marks for Zoology Paper II is 250.

What is the time allowed for this paper?

The time allowed for this paper is Three Hours.

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