ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What is peer review?

1. AReading a textbook to learn a topic
2. BRepeating your own experiment many times
3. CAsking patients for their opinion of a treatment
4. DExperts checking a study before it is published

In science, what is an observation?

1. AA rule that explains all known facts
2. BInformation gathered with the senses or instruments
3. CA guess about why something happens
4. DA conclusion drawn before any data are collected

What is the R group of an amino acid?

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

When most people in a community are vaccinated, people who cannot be vaccinated are also protected. Why?

1. AThe vaccine spreads from person to person
2. BVaccinated people make antibodies for others
3. CThe pathogen has too few hosts to spread easily
4. DThe pathogen mutates into a harmless form

ما الطفرة؟

1. Aالنسخ الطبيعي لـ DNA قبل الانقسام
2. Bاقتران الصبغيات المتماثلة
3. Cتغيّر في عدد الخلايا في نسيج
4. Dتغيّر في تتابع قواعد DNA

Which sequence describes the usual flow of genetic information in a cell?

1. ADNA to RNA to protein
2. BDNA to protein to RNA
3. CProtein to RNA to DNA
4. DRNA to DNA to protein

A man has Klinefelter syndrome (XXY). Which error most likely produced it?

1. ANondisjunction of the sex chromosomes during meiosis in a parent
2. BCrossing over between chromosome 21 and the X chromosome
3. CA frameshift mutation in one of the genes on the father's Y chromosome
4. DExtra mitosis in the zygote after fertilisation

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. AHuman DNA has no start codons
2. BBacteria have no ribosomes
3. CBacteria cannot remove introns
4. DBacteria cannot read human codons