Question

The alpha helix and beta sheets in a protein binding together to form a larger structure is which structural level of a protein?

		primary
		quatarnary
		secondary
		tertiary

In the scientific method after you have designed your experiment the next step is to?

		create a hypothesis
		collect data
		alter or reject hypothesis
		analyze results

Which of these is an example of qualitative data?

		A scientist measures the change height in plants that were watered with different levels of nitrogen.
		Scientists measure the volume of oxygen in mL produced by photosynthetic bacteria in different light levels.
		A scientist measures change in weight in rabbits fed diets with different carbohydrate contents.
		A scientist asks human subjects taking a new medication how much better they feel on a scale of 1-5.

Answer 1

1. Alpha helix and Beta pleated sheet are the structures which correspond to the secondary level of a protein. They have a specific shape, therefore they belong to secondary level.

Primary level consists of only a single chain of amino acids arranged as beads in a string.

Tertiary level is fully organized into a three dimensional functional form.

Quaternary level has four subunits. Eg hemoglobin.

2. The steps of conducting an experimental research are:-

• Identification of problem/study
• Reviewing the literature
• Formation of hypothesis
• Designing of an experiment
• Collection of data
• Experiment conducted
• Analyze the results
• Accept or reject the hypothesis.

3. Qualitative data means which cannot be measured like pain, feeling, happiness, etc. Quantitative data means which can be measured like weight, height, volume, etc.

Change in height, volume of oxygen, weight, etc are the quantitative data. Whereas how better the humans feel rating on a scale cannot be measured as 1 for you can be 2 for other. Rating the feeling on a scale is not a reliable indicator as it is highly variable. Therefore answer is option d.