ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What does transfer RNA (tRNA) do?

1. AIt carries the code out of the nucleus
2. BIt copies DNA in the nucleus
3. CIt brings amino acids to the ribosome
4. DIt joins two DNA strands together

Which type of microscope is needed to see a virus?

1. AA magnifying glass
2. BA dissecting microscope
3. CA light microscope
4. DAn electron microscope

What is the R group of an amino acid?

1. AThe side chain that differs between amino acids
2. BThe carboxyl group at one end
3. CThe peptide bond between two amino acids
4. DThe amino group that is shared by all amino acids

A student switches a light microscope from low power to high power. What happens to the field of view?

1. AIt gets larger but less detailed
2. BIt gets larger and brighter
3. CIt gets smaller and usually darker
4. DIt stays the same size but gets brighter

After gel electrophoresis, which DNA fragments are found furthest from the wells?

1. AThe smallest fragments
2. BThe largest fragments
3. CThe fragments with the most adenine
4. DThe fragments with the most guanine

A tall pea plant could be TT or Tt. Which cross will best reveal its genotype?

1. ACross it with a TT plant
2. BCross it with another tall plant
3. CCross it with a short (tt) plant
4. DLet it grow for a longer time

Why is one new DNA strand made in short pieces (Okazaki fragments) during replication?

1. AThe lagging strand is made of RNA instead of DNA, so it must be built in pieces
2. BDNA polymerase works only 5' to 3', and the strands are antiparallel
3. COnly half of the DNA needs to be copied
4. DHelicase cuts that strand into pieces before copying

Why can O-negative red blood cells be given to patients of almost any blood type in an emergency?

1. AThey have no haemoglobin to react with
2. BThey carry no A, B or RhD antigens
3. CThey carry all of the A, B and RhD antigens
4. DTheir plasma contains anti-A and anti-B antibodies