उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

What is an allele?

1. AA section of DNA between genes
2. BA protein made from a gene
3. CA different version of the same gene
4. DA pair of matching chromosomes from each parent

What is a chromosome?

1. AA single gene that codes for one protein
2. BA long DNA molecule, packed with proteins, carrying many genes
3. CA strand of RNA that leaves the nucleus
4. DA small organelle in the cytoplasm that makes ATP for the cell

DNA में कौन-से चार क्षारक पाए जाते हैं?

1. Aऐलानिन, थाइमिन, ग्लाइसिन और सिस्टीन
2. Bऐडेनिन, थाइमिन, ग्लूकोज़ और साइटोसिन
3. Cऐडेनिन, यूरेसिल, ग्वानिन और साइटोसिन
4. Dऐडेनिन, थाइमिन, ग्वानिन और साइटोसिन

Sickle cell disease is caused by a single base change that replaces one amino acid in haemoglobin. What type of mutation is this?

1. AA nonsense mutation
2. BA silent mutation
3. CA frameshift mutation
4. DA missense mutation

Which stage of aerobic respiration produces the most ATP?

1. AThe electron transport chain
2. BFermentation
3. CThe Krebs cycle in the matrix
4. DGlycolysis in the cytoplasm

A student's hypothesis is "Salt water slows the growth of bean seedlings." Which is a prediction based on it?

1. ASeedlings given plain water will die within a week
2. BBean seedlings need sunlight and water to grow well
3. CSalt water is made of sodium chloride and water
4. DSeedlings given salt water will grow less than those given plain water

Scientists put a human gene into bacteria to make a protein. Why do they use a DNA copy made from the mature mRNA instead of the gene taken straight from human DNA?

1. ABacteria cannot read human codons
2. BBacteria cannot remove introns
3. CBacteria have no ribosomes
4. DHuman DNA has no start codons

Five recovery times in days are 5, 6, 6, 7 and 30. Which value best describes a typical recovery time, and why?

1. AThe maximum of 30, because it shows the worst case
2. BThe mean of 10.8, because it uses every value
3. CThe median of 6, because the outlier pulls the mean up
4. DThe range of 25, because it shows the spread