A researcher is studying plant development. She isolates a mutant and discovers that the piece of DNA that is mutated does not code for a protein. However, this piece of DNA is complimentary to a gene known to function in early embryonic plant
development. The mutant she identified most likely functions as a(n) ________.
A) microRNA (miRNA)
B) transfer RNA (tRNA)
C) intron
D) ribosomal RNA (rRNA)
E) general transcription factor known to regulate many different genes
Answer: A
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Based on a variety of experiments, it is known that the rate of photosynthesis is highest when wavelengths of light between 400 and 500 nm are used, and when wavelengths around 700 nm are used. What does this indicate about the relative importance of chlorophyll a and b in photosynthesis?
A. Reflection of light by chlorophyll a and b is essential for the process of photosynthesis
B. Absorption of light by chlorophyll a and b is essential for the process of photosynthesis
C. Transmission of light by chlorophyll a and b is essential for the process of photosynthesis
D. Chlorophyll a and b are much less important than other pigments in the reflection, absorption and transmission of light relevant to photosynthesis
Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content
What do you already know about the role of pigments during photosynthesis? What other information is related to the question?
Choose Answer
Do you have all the information needed to analyze the graph and answer the question?
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What limitation(s) make it impossible to travel between stars? I. fuel requirements II. the tremendous distances between stars III. the finite speed at which objects can travel
a. I b. II c. III d. II & III e. I, II, & III
Biological molecules are composed of building blocks that are linked together to form ____.
A) functional groups B) ball-and-stick models C) space-filling models D) monomers E) polymers
Which of the following occurs in the first stage of glycolysis?
a. Preparing the six-carbon ring of glucose for separation b. Dividing the six-carbon ring of glucose into two three-carbon rings c. Extracting ATP and high-energy electrons from hydrogen atoms d. Producing NADH and ATP to prepare for glucose separation