A student in a biology class is examining a cell under a microscope. The student can identify a cell membrane, cytoplasm and DNA. The cell does not seem to have any membrane bound organelles. What type of cell is the student most likely looking at under the microscope? Explain your answer.

Asolution of an enzyme and a substrate was placed in a water bath and the temperature of the reaction was raised gradually. the graph shown was plotted at the end of the experiment. what can be concluded from the graph? a) temperature has no effect on the activity of the enzyme. b) the effect of temperature on the enzyme is unpredictable. c) the enzyme shows increased activity up to a certain temperature. d) the activity of the enzyme is inversely proportional to the temperature.

In each transformation of energy , some energy what?

Which statement describes compounds a. compounds are made of one type of atom. b. compounds cannot be represented by models. c. compounds are represented by chemical formulas. d. compounds cannot be broken down into simpler forms.