ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

What does homozygous mean?

1. AHaving an extra chromosome
2. BHaving only one copy of a gene
3. CHaving two different alleles for a gene
4. DHaving two identical alleles for a gene

In science, what is an observation?

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

أي مما يلي دهن (ليبيد)؟

1. Aثلاثي الغليسريد (دهن)
2. BDNA
3. Cالغليكوجين، الشكل المخزَّن للغلوكوز
4. Dالهيموغلوبين

Which DNA bases are purines?

1. AAdenine and guanine
2. BAdenine and thymine
3. CCytosine and thymine
4. DCytosine and guanine

What does the enzyme lipase break down?

1. AProteins into amino acids and peptides
2. BStarch into sugars
3. CDNA into nucleotides
4. DFats into fatty acids and glycerol

How do embryonic stem cells differ from most adult stem cells?

1. AThey are found only in plants, while adult stem cells are found in animals
2. BThey can become almost any cell type, while adult stem cells are more limited
3. CThey can no longer divide, while adult stem cells divide quickly
4. DThey are haploid, while adult stem cells are diploid

After wolves are removed from a park, the deer population rises sharply and young trees are overgrazed. What does this show?

1. AWolves compete with trees for sunlight
2. BRemoving a predator has no effect on plants
3. CDeer are producers in the food web
4. DOrganisms in a food web depend on each other

Which statement correctly compares DNA replication and transcription?

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