उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

What is the R group of an amino acid?

1. AThe side chain that differs between amino acids
2. BThe carboxyl group at one end
3. CThe amino group that is shared by all amino acids
4. DThe peptide bond between two amino acids

What is the job of messenger RNA (mRNA)?

1. AIt stores genetic information in the nucleus permanently
2. BIt carries amino acids to the ribosomes
3. CIt carries the genetic code from DNA to the ribosomes
4. DIt forms the main structure of the ribosome

What is the main material in the cell wall of bacteria?

1. AKeratin
2. BPeptidoglycan
3. CCellulose
4. DChitin

लाल फूलों वाले पौधे का संकरण सफ़ेद फूलों वाले पौधे से कराया जाता है और सभी संतानों के फूल गुलाबी होते हैं। यह क्या दर्शाता है?

1. Aसह-प्रभाविता (कोडोमिनेंस)
2. Bअपूर्ण प्रभाविता (इनकम्प्लीट डोमिनेंस)
3. Cलिंग-सहलग्न लक्षण
4. Dपूर्ण प्रभाविता

Where does the oxygen released by photosynthesis come from?

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

How can bacteria pass antibiotic-resistance genes directly to other bacteria?

1. ABy meiosis, forming gametes with new alleles
2. BBy osmosis, moving genes in water
3. CBy conjugation, transferring plasmids through a pilus
4. DBy mitosis, sharing copies of their chromosomes with neighbours

A student puts a fertilised plant in a sunny window and an unfertilised plant in a dark cupboard. The fertilised plant grows more. What is the main flaw?

1. AThere was no hypothesis to test
2. BTwo variables were changed, so the cause is unclear
3. CThe student used too much fertiliser on the plant in the window
4. DThe dependent variable was not measured

Why does the influenza vaccine need to be updated most years?

1. AThe vaccine damages the immune system after one year, so it must be repeated
2. BAntibodies cannot be made against viruses
3. CInfluenza is caused by a different bacterium each year
4. DThe virus keeps changing its surface proteins through mutation