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ScienceCh.3
Cell Processes
Question | Answer |
---|---|
DNA: T- G- | DNA: A-T C-G |
RNA: A- C- | RNA: A-T C-G |
What structure contains the instructions for making a specific protein? | gene |
What makes up the ladder of a DNA molecule? | phosphate |
Messenger RNA | match with 3 nitrogen bases on the tRNA |
ribosomal RNA | make up ribosomes |
transfer RNA | bring amino acids to ribosomes |
How many cells are formed at the end of mitosis I? | 2 |
Meiosis I is the same as...? | Mitosis |
Meiosis I begins with 1 cell. How many cells are formed by the end of Meiosis II? | 4 |
a cell w/ pairs of chromosomes...? | diploid |
cell w/ a single set of chromosomes...? | haploid |
centromeres divide in...? | anaphase II |
How are sex cells different from other cells? | Sex cells have half the chromosomes |
In fertilization...? | a zygote is formed after joining the egg and sperm |
mitosis is a form of...? | asexual reproduction |
skin cells always... | need to be replaced (undergo mitosis) |
3 types of asexual reproduction... | -budding -regeneration -fission |
Cell Division | # of cells and caused many celled organisms to grow |
interphase | most of the life of any eukaryotic cell is spent in this period of growth |
mitosis | nucleus divides to form 2 identical nuclei |
chromosomes | structive nucleous that has hereditary material |
metaphase | chromosomes line up in the center |
anaphase | centromeres divide |
telephase | spindle fibers and a new nucleos appear |
sexual reproduction | egg and sperm come together |
sperm | formed in the male reproductive system |
egg | formed in the female reproductive system |
fertilization | joining of the egg and sperm |
zygote | cell that forms from fertilization |
diploid | ccell that have similiar chromosomes |
haploid | single |
meioisis | produces haploid sex cells |
DNA | deoxyribonucleic acid |
mutations | any permament change in the dna sequence of a gene or chromosomes of a cell |