1、the dna of prokaryotic cells is concentrated in the nucleus.
2、ribosomes are derived from the nucleoli.
3、unlike other cell membranes, the nuclear envelope has no pores.
4、the smooth endoplasmic reticulum is held in place by the cytoskeleton.
5、structural proteins are exportable.
6、the nuclear envelope is produced by the rough endoplasmic reticulum.
7、most cllar proteins are manufactured on ribosomes.
8、prokaryotic cells have microbodies.
光合作用随堂测验
1、the process of photosynthesis can be consid-ered as a series of reactions in which light energy from the sun is（ ）。 a、transformed into chemical energy b、not transformed in the plant c、transformed into kinetic energy d、transformed into potential energy
2、in the first stage of photosynthesis water is（ ）。 a、oxidized b、phosphorylated c、reduced d、heated
3、the end products of the first stage of photo-synthesis that drive the second stage are( ). a、adp and nad b、atp and nadph c、h2o and adp d、co2
4、photosynthesis occurs in all living things.
5、cyclic photophosphorylation peoduces additional atp in plants.
减数分裂随堂测验
1、autosome include x and y chromosomes.
2、cells enter g2 at the end of the s phase.
3、chalones promote cell division.
4、the nuclear envelope forms in telophase.
5、all daughter cells are haploid.
遗传学随堂测验
1、medel's experiments with peas had unique and important features, including the fact that ( ). a、he studied traits that offered only two alternative outcomes b、he followed and recorded the type and number of all offspring c、he followed the results of each cross for two generations d、all of the above
2、alleles are simply alternate forms of genes.
3、an xo male may result from nondisjunction.
4、mendel's second law states that characters are inherited dependently.