उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

What is cytokinesis?

1. AThe copying of DNA before division
2. BThe division of the cytoplasm into two cells
3. CThe condensing of chromosomes in prophase
4. DThe pairing of homologous chromosomes

What is a karyotype?

1. AA list of all the proteins that a cell makes during its life
2. BA picture of a cell's chromosomes arranged in pairs by size
3. CA diagram of a family's inheritance pattern
4. DA map of the organelles inside a cell

What is a neuron?

1. AA nerve cell that carries electrical signals
2. BA bone cell that stores calcium
3. CA muscle cell that contracts
4. DA blood cell that carries oxygen around the body

उत्परिवर्तन (म्यूटेशन) क्या है?

1. Aसमजात गुणसूत्रों का जोड़ा बनाना
2. BDNA के क्षारक अनुक्रम में परिवर्तन
3. Cकिसी ऊतक में कोशिकाओं की संख्या में परिवर्तन
4. Dविभाजन से पहले DNA की सामान्य प्रतिलिपि बनना

Why do plants wilt when the soil around their roots becomes very salty?

1. ASalt makes the root cells swell and burst
2. BSalt blocks sunlight from reaching the leaves
3. CThe roots take in too much water
4. DWater leaves the root cells by osmosis

During childbirth, pressure on the cervix causes oxytocin release, which causes stronger contractions and more pressure. What kind of control is this?

1. ANegative feedback
2. BPositive feedback
3. CNatural selection
4. DHomeostatic balance

Parts of a protein chain coil into alpha helices and fold into beta sheets, held by hydrogen bonds. Which level of protein structure is this?

1. ASecondary structure
2. BQuaternary structure
3. CPrimary structure
4. DTertiary structure

Fleming saw a clear area with no bacteria around a Penicillium mould growing on a bacterial plate. What was the best explanation?

1. AThe bacteria had moved away to find more food
2. BThe bacteria had turned into mould cells
3. CThe mould used up all of the oxygen that the nearby bacteria needed
4. DThe mould released a substance that killed or stopped the bacteria