उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

Which of these diseases is caused by a virus?

1. AInfluenza
2. BMalaria
3. CTuberculosis
4. DAthlete's foot

How does a vaccine protect a person?

1. AIt replaces the person's white blood cells with stronger ones
2. BIt trains the immune system with a harmless form of a pathogen
3. CIt blocks the pathogen from entering the nose
4. DIt kills all bacteria in the body straight away

What does xylem carry in a plant?

1. AOxygen from the leaves to the roots
2. BSeeds from the flowers to the soil
3. CSugars from the leaves to the roots
4. DWater and minerals from the roots upward

संतृप्त वसा असंतृप्त वसा से किस प्रकार भिन्न है?

1. Aउनमें नाइट्रोजन होती है और वे प्रोटीन बनाती हैं
2. Bउनमें C=C द्विआबंध नहीं होते और वे सामान्यतः ठोस होती हैं
3. Cउनमें बहुत-से द्विआबंध होते हैं और वे कमरे के तापमान पर तरल होती हैं
4. Dवे पानी में आसानी से घुल जाती हैं

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

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

Which of these is part of the body's innate (non-specific) defence?

1. AMemory B cells from an earlier infection
2. BThe skin and stomach acid
3. CT cells that recognise one virus
4. DAntibodies made after vaccination

Kidney tubule cells move glucose from the filtrate back into the blood, even when there is less glucose in the filtrate than in the cells. What does this show?

1. AGlucose is moved by active transport
2. BGlucose is moved by simple diffusion
3. CGlucose moves only down its gradient
4. DGlucose is moved by osmosis

In the Hershey–Chase experiment, viruses were labelled with radioactive phosphorus in their DNA or radioactive sulfur in their protein. Only the phosphorus entered the infected bacteria. What did this show?

1. ADNA, not protein, is the genetic material of the virus
2. BViruses contain no DNA at all
3. CBacteria take up any radioactive substance
4. DProtein, not DNA, is the genetic material of the virus