उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

किसी प्रयोग में स्वतंत्र चर क्या होता है?

1. Aवह कारक जो हर समूह में समान रखा जाता है
2. Bवह कारक जिसे परिणाम के रूप में मापा जाता है
3. Cवह समूह जिसे कोई उपचार नहीं मिलता
4. Dवह कारक जिसे शोधकर्ता जान-बूझकर बदलता है

Which list gives the main taxonomic ranks from broadest to most specific?

1. ADomain, phylum, kingdom, order, class, genus, family, species
2. BSpecies, genus, family, order, class, phylum, kingdom, domain
3. CKingdom, domain, class, phylum, family, order, species, genus
4. DDomain, kingdom, phylum, class, order, family, genus, species

Which enzyme unwinds the DNA double helix and separates the two strands for copying?

1. AAmylase
2. BLipase
3. CHelicase
4. DLigase

Why do chromosomes condense into short, thick shapes before mitosis?

1. ASo they can be moved apart without tangling or breaking
2. BSo that they can leave through the nuclear pores
3. CSo that they can be copied more quickly
4. DSo that genes can be transcribed more easily

What is a chromosomal translocation?

1. AA piece of a chromosome is copied twice and stays in the same place
2. BA piece of one chromosome attaches to a non-matching chromosome
3. COne DNA base is replaced by another base
4. DA piece of a chromosome is flipped around in place

Why do many plants close their stomata on hot, dry days?

1. ATo take in more carbon dioxide
2. BTo release more oxygen
3. CTo reduce water loss
4. DTo speed up photosynthesis

AaBb पौधे का संकरण aabb पौधे से कराया जाता है। जीन स्वतंत्र रूप से अपव्यूहित होते हैं। संतानों में कौन-सा फ़ीनोटाइप अनुपात अपेक्षित है?

1. A1 : 1 : 1 : 1
2. B9 : 3 : 3 : 1
3. C1 : 2 : 1
4. D3 : 1

Why can O-negative red blood cells be given to patients of almost any blood type in an emergency?

1. AThey carry no A, B or RhD antigens
2. BThey have no haemoglobin to react with
3. CThey carry all of the A, B and RhD antigens
4. DTheir plasma contains anti-A and anti-B antibodies