Question

Which of the following statements are correct about imaging and measurement in biology? A. X-ray crystallography determines atomic level structure. B. CT-Scan provides 3D imaging of tissues. C. ECG records brain activity. D. EEG records electrical activity in brain. E. GM Count detects radioactive particles.

• A. A, B, D and E only
• B. C, D and E only
• C. A, B, C, D and E
• D. A, B and C only

Hint:

ECG is for heart, EEG is for brain, CT gives imaging, X-ray crystallography gives atomic structure, and GM counter detects radioactivity.

Answer 1

The Correct Option is A

Concept:
Biology uses different instruments for imaging, structural analysis, electrical activity measurement, and radioactivity detection.

Step 1: Check statement A.
X-ray crystallography can determine atomic-level structures of molecules. \[ A \text{ is correct} \]

Step 2: Check statement B.
CT scan provides cross-sectional and 3D imaging of tissues. \[ B \text{ is correct} \]

Step 3: Check statement C.
ECG records electrical activity of the heart, not the brain. \[ C \text{ is incorrect} \]

Step 4: Check statement D.
EEG records electrical activity of the brain. \[ D \text{ is correct} \]

Step 5: Check statement E.
GM counter detects radioactive particles. \[ E \text{ is correct} \] Thus, the correct statements are: \[ A,\ B,\ D,\ E \] \[ \therefore \text{Correct Answer is (A)} \]