护理入学考试生物练习卷（附答案）

下列哪一项是脂质？

1. A糖原，葡萄糖的储存形式
2. B甘油三酯（脂肪）
3. CDNA
4. D血红蛋白

What is a tissue?

1. AA single cell that has one special job in the body
2. BA structure inside a cell
3. CSeveral organs that work together
4. DA group of similar cells that work together

What does homozygous mean?

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

How does cytokinesis differ between animal cells and plant cells?

1. AAnimal cells build a cell plate; plant cells pinch in with a furrow
2. BOnly animal cells carry out cytokinesis
3. COnly plant cells carry out cytokinesis
4. DAnimal cells pinch in with a furrow; plant cells build a cell plate

What happens in the lytic cycle of a virus?

1. AThe virus divides by binary fission outside the cell
2. BThe virus makes many copies in the host cell, which then bursts
3. CThe viral DNA joins the host DNA and stays inactive for a long time
4. DThe host cell makes antibodies against the virus

What does RNA polymerase do?

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

Why are mutations in mitochondrial DNA passed on only from mothers to their children?

1. AOnly women have mitochondria in their cells
2. BMitochondrial DNA is on the X chromosome
3. CThe zygote's mitochondria come from the egg
4. DSperm cells contain no DNA at all

Two parents who both have a genetic condition have a child who does not. Assuming a single gene, what inheritance pattern does this show?

1. AAutosomal recessive, with both parents homozygous
2. BAutosomal dominant, with both parents heterozygous
3. CX-linked recessive, with the father as a carrier
4. DAutosomal recessive, with both parents heterozygous