Biology for nursing entrance exams worksheet with answers

What is an inference?

1. AA conclusion reached from observations and prior knowledge
2. BA variable that the scientist changes on purpose
3. CA measurement taken with a calibrated instrument in a laboratory
4. DA list of the materials used in an experiment

In an experiment, what is the independent variable?

1. AThe factor kept the same in every group
2. BThe factor the researcher deliberately changes
3. CThe factor that is measured as the result
4. DThe group that receives no treatment

Which four bases are found in DNA?

1. AAdenine, thymine, guanine and cytosine
2. BAlanine, thymine, glycine and cysteine
3. CAdenine, thymine, glucose and cytosine
4. DAdenine, uracil, guanine and cytosine

What is a codon?

1. AA group of three mRNA bases that codes for one amino acid
2. BA single base that codes for a protein
3. CA protein that starts transcription
4. DThe part of a chromosome where the spindle fibres attach during mitosis

A tablet contains 2.5 g of a substance. How many milligrams is this?

1. A0.0025 mg
2. B25 mg
3. C250 mg
4. D2500 mg

What is the difference between an antiseptic and a disinfectant?

1. AAntiseptics kill all spores; disinfectants kill none
2. BAntiseptics are antibiotics; disinfectants are vaccines
3. CAntiseptics are used on objects and floors; disinfectants are used on skin
4. DAntiseptics are used on living tissue; disinfectants are used on objects

Sweating cools the body. Which property of water best explains this?

1. AIt has a very low specific heat
2. BIt is less dense as ice than as a liquid
3. CIt takes a lot of heat energy to evaporate
4. DIt is a nonpolar solvent

An Rh-negative mother gives birth to an Rh-positive baby. Why could a later Rh-positive pregnancy be at risk?

1. AHer red cells may become Rh positive after the birth
2. BThe second baby will be unable to make any red cells
3. CShe may have made anti-D antibodies that cross the placenta
4. DThe first baby's antibodies remain in her blood and attack her