Nucleic acids are made up of nitrogen bases, sugars, and phosphates.
A mold was developing in some of the culture dishes used by Sir Alexander Fleming and was eliminating some of the bacterial population. The hypothesis is that the mold was generating a chemical, which was toxic to the bacteria in the dishes and killed them.
The hypothesis was examined by separating the Penicillium and administering it into the solution of nutrient broth. After the growth of Penicillium it was withdrawn from the broth. The broth was then eventually supplemented to the bacteria and the bacteria died. Thus, it can be concluded that the hypothesis is supported.
Explanation :
A. Instructions for protein synthesis and cell reproduction; contains genetic information - <u>Nucleus </u>
B. Intracellular compartment forms transport vesicles; participates in lipid synthesis and synthesis of membrane or secreted proteins - <u>Endoplasmic reticulum</u>
C. Packages proteins for export from cell; forms secretory vesicle -<u> Golgi apparatus.</u>
D. Digest worn-out organelles and cell debris; digest material taken up by endocytosis -<u> lysosomes</u>
E. ""Power plants"" of the cell; sites of oxidative metabolism - <u>Mitochondria</u>
F. Sites of photosynthesis<u> - chloroplasts</u>
G. Regulates water levels in plant cells <u>- vacuole</u>
H. Used in break down of fats and contains the enzyme catalase - <u>peroxisome</u>
The seven steps of the scientific method start with observing the occurrence or asking a question, researching the topic, forming a hypothesis, designing and conducting an experiment, analyzing results, drawing a conclusion and reporting results.
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