Download PDF – UKSSSC Pashudhan Prasar Adhikari Full-Length Mock Test – 2 | Biology Domain
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UKSSSC Pashudhan Prasar Adhikari Full-Length Mock Test – 2 | Biology Domain
Q1. Which of the following nitrogenous bases is found in RNA but is absent in DNA?
A) Adenine
B) Thymine
C) Uracil
D) Guanine
Q1. निम्नलिखित में से कौन सा नाइट्रोजनस बेस RNA में पाया जाता है लेकिन DNA में अनुपस्थित होता है?
A) एडेनिन
B) थाइमिन
C) यूरेसिल (Uracil)
D) ग्वानिन
Answer: (C)
RNA contains Uracil in place of Thymine, which pairs with Adenine. The other bases (Adenine, Guanine, Cytosine) are common to both.
RNA में थाइमिन के स्थान पर यूरेसिल होता है, जो एडेनिन के साथ जुड़ता है। अन्य बेस (एडेनिन, ग्वानिन, साइटोसिन) दोनों में आम हैं।
Q2. During which specific phase of the cell cycle does DNA replication (synthesis) occur?
A) G1 phase
B) S phase
C) G2 phase
D) M phase
Q2. कोशिका चक्र के किस विशिष्ट चरण के दौरान डीएनए प्रतिकृति (संश्लेषण) होती है?
A) G1 चरण
B) S चरण (S phase)
C) G2 चरण
D) M चरण
Answer: (B)
The S (Synthesis) phase is the part of the cell cycle in which DNA is replicated, occurring between G1 phase and G2 phase.
S (सिंथेसिस) चरण कोशिका चक्र का वह भाग है जिसमें डीएनए की प्रतिकृति होती है, जो G1 चरण और G2 चरण के बीच होता है।
Q3.
Match List-I (Biomolecule) with List-II (Type of Bond forming its polymer):
| List-I | List-II |
|---|---|
| A. Proteins B. Carbohydrates (Polysaccharides) C. Nucleic Acids (DNA/RNA) D. Lipids (Fats) | 1. Phosphodiester bond 2. Ester bond 3. Peptide bond 4. Glycosidic bond |
A) A-3, B-4, C-1, D-2
B) A-4, B-3, C-1, D-2
C) A-3, B-1, C-4, D-2
D) A-2, B-4, C-1, D-3
Q3.
सूची-I (जैव अणु) को सूची-II (इसके बहुलक को बनाने वाले बांड का प्रकार) के साथ सुमेलित करें:
| सूची-I | सूची-II |
|---|---|
| A. प्रोटीन B. कार्बोहाइड्रेट (पॉलीसेकेराइड) C. न्यूक्लिक एसिड (DNA/RNA) D. लिपिड (वसा) | 1. फॉस्फोडिएस्टर बांड 2. एस्टर बांड 3. पेप्टाइड बांड 4. ग्लाइकोसिडिक बांड |
A) A-3, B-4, C-1, D-2
B) A-4, B-3, C-1, D-2
C) A-3, B-1, C-4, D-2
D) A-2, B-4, C-1, D-3
Answer: (A)
Proteins = Peptide bonds. Polysaccharides = Glycosidic bonds. DNA/RNA = Phosphodiester bonds. Lipids (Triglycerides) = Ester bonds.
प्रोटीन = पेप्टाइड बांड। पॉलीसेकेराइड = ग्लाइकोसिडिक बांड। DNA/RNA = फॉस्फोडिएस्टर बांड। लिपिड = एस्टर बांड।
Q4.
Assertion (A): Meiosis is essential for maintaining a constant chromosome number across generations in sexually reproducing organisms.
Reason (R): Meiosis is a reductional division that halves the number of chromosomes in the gametes.
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is NOT the correct explanation of A
C) A is true but R is false
D) A is false but R is true
Q4.
अभिकथन (A): यौन प्रजनन करने वाले जीवों में पीढ़ियों तक निरंतर गुणसूत्र संख्या बनाए रखने के लिए अर्धसूत्रीविभाजन (Meiosis) आवश्यक है।
कारण (R): अर्धसूत्रीविभाजन एक न्यूनीकरण विभाजन (reductional division) है जो युग्मकों (gametes) में गुणसूत्रों की संख्या को आधा कर देता है।
A) A और R दोनों सत्य हैं और R, A का सही स्पष्टीकरण है
B) A और R दोनों सत्य हैं लेकिन R, A का सही स्पष्टीकरण नहीं है
C) A सत्य है लेकिन R असत्य है
D) A असत्य है लेकिन R सत्य है
Answer: (A)
Because meiosis halves the chromosome number (2n to n) during gamete formation, the diploid number (2n) is restored when fertilization (fusion of n+n) occurs.
चूंकि युग्मक निर्माण के दौरान अर्धसूत्रीविभाजन गुणसूत्र संख्या (2n से n) को आधा कर देता है, इसलिए निषेचन होने पर द्विगुणित संख्या (2n) बहाल हो जाती है।
Q5. Which among the following is NOT a defining characteristic of living organisms?
A) Metabolism
B) Cellular organization
C) Growth
D) Consciousness
Q5. निम्नलिखित में से कौन सा जीवित जीवों (living organisms) का परिभाषित करने वाला लक्षण (defining characteristic) नहीं है?
A) चयापचय (Metabolism)
B) सेलुलर संगठन
C) वृद्धि (Growth)
D) चेतना (Consciousness)
Answer: (C)
Growth is not a defining characteristic because non-living objects (like mountains or sand dunes) can also grow by the accumulation of material on their surface.
वृद्धि एक परिभाषित लक्षण नहीं है क्योंकि निर्जीव वस्तुएं (जैसे पहाड़ या रेत के टीले) भी अपनी सतह पर सामग्री के संचय से बढ़ सकती हैं।
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