ใบงาน ชีววิทยาสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

In biology, what is a clone?

1. AA cell with an extra chromosome
2. BA genetically identical copy of an organism, cell or gene
3. CAn offspring of two different parents
4. DAn organism that carries genes from two different species

Which feature helps a sperm cell carry out its job?

1. AA flagellum for swimming
2. BChloroplasts for making food
3. CA large vacuole for storing water
4. DA cell wall for protection

What is a scientific law?

1. AA statement of what always happens under certain conditions
2. BA rule that scientists vote to accept
3. CAn explanation that has been proven wrong
4. DA guess about the cause of something that has not yet been tested

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

In a pedigree, a trait appears in every generation, and every affected child has at least one affected parent. Which inheritance pattern is most likely?

1. AX-linked recessive
2. BA new mutation in each generation
3. CAutosomal dominant
4. DAutosomal recessive

Why must human gametes be haploid?

1. ASo that the zygote has the normal number of 46 chromosomes
2. BSo that the zygote has twice the normal number of chromosomes
3. CSo that the gametes can make more proteins
4. DSo that the gametes can divide quickly by mitosis

Why does cooking oil not mix with water?

1. AWater molecules are nonpolar and avoid each other
2. BOil molecules are nonpolar and cannot form hydrogen bonds with water
3. COil is denser than water and sinks
4. DOil molecules are polar and repel the charged ends of water molecules

Which statement correctly compares DNA replication and transcription?

1. AReplication makes RNA from DNA; transcription makes DNA from RNA
2. BBoth use thymine and deoxyribose in the new strand
3. CBoth take place on ribosomes in the cytoplasm
4. DReplication copies all the DNA; transcription copies one gene