उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

What is the single most important way to prevent the spread of infection in hospitals?

1. AHand hygiene
2. BWearing a hair net
3. CGiving every patient antibiotics
4. DOpening the windows

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

1. ALipase
2. BAmylase
3. CHelicase
4. DLigase

प्रकाश संश्लेषण किस कोशिकांग में होता है?

1. Aगॉल्जी उपकरण
2. Bकेंद्रक
3. Cक्लोरोप्लास्ट
4. Dमाइटोकॉन्ड्रिया

"द्विगुणित" (डिप्लॉइड) का क्या अर्थ है?

1. Aकोशिका में गुणसूत्रों के दो समुच्चय होते हैं
2. Bकोशिका में गुणसूत्रों का एक समुच्चय होता है
3. Cकोशिका केवल एक बार विभाजित हो सकती है
4. Dकोशिका में केंद्रक नहीं होता

Identical twins raised in different homes have different body weights. What does this show?

1. AThe twins must have different genotypes for body weight genes
2. BThe phenotype depends on environment as well as genotype
3. CMutations happened in every cell of one twin
4. DBody weight is controlled by a single gene

Where does the oxygen released by photosynthesis come from?

1. AFrom chlorophyll that is used up
2. BFrom water molecules that are split
3. CFrom glucose that is broken down
4. DFrom carbon dioxide molecules that are split

Plants in waterlogged soil take up fewer mineral ions, even when the ions are plentiful. What is the best explanation?

1. AWater dilutes the ions so much that roots cannot detect them
2. BRoot cells lack oxygen, so less ATP is made for active transport
3. CWaterlogged roots carry out more photosynthesis
4. DMineral ions only enter by osmosis, and osmosis stops in wet soil

PCR starts with one double-stranded DNA molecule, and the number of copies doubles each cycle. How many copies are there after 10 cycles?

1. A512
2. B1024
3. C100
4. D20