Biology for nursing entrance exams worksheet with answers

Where is most of the DNA of a eukaryotic cell found?

1. AIn the nucleus
2. BIn the cell wall
3. CIn the lysosomes
4. DIn the cell membrane

Which organelle makes lipids and helps break down drugs and toxins in liver cells?

1. ANucleolus
2. BSmooth endoplasmic reticulum
3. CCentriole
4. DRough endoplasmic reticulum

An organism has the genotype Bb. How is it described?

1. AHaploid
2. BHomozygous recessive
3. CHomozygous dominant
4. DHeterozygous

What does RNA polymerase do?

1. AIt builds a protein from an mRNA template
2. BIt builds an RNA strand from a DNA template
3. CIt copies the whole genome before cell division
4. DIt removes introns from pre-mRNA

Which body system works with the respiratory system to deliver oxygen to body cells?

1. AThe circulatory system
2. BThe skeletal system
3. CThe digestive system
4. DThe urinary system

Where does the Krebs (citric acid) cycle take place in a eukaryotic cell?

1. AIn the cytoplasm
2. BIn the mitochondrial matrix
3. CIn the nucleus
4. DOn the rough endoplasmic reticulum

A restriction enzyme cuts at three sites in a linear piece of DNA. How many fragments are produced?

1. A2
2. B4
3. C3
4. D6

Mature human red blood cells have no nucleus and no mitochondria. What follows from this?

1. AThey make ATP by aerobic respiration using the oxygen they carry
2. BThey cannot divide and make their ATP by glycolysis only
3. CThey keep making new haemoglobin throughout their life
4. DThey live longer than almost all other body cells