---

---

Select your answer:
         

Next Quiz >

Topics:

Circulation of Blood Skeleton CVA Eye in Color Vision Balanced Diet Macro and Micro Nutrients Teeths Medical Microbiology Bacteria & Viruses Lung & Breathing Nervous System/Endocrine System Obesity Vitamin Osteoporosis Tutor Oral Biology

Other quiz:

DNA Structure, Replication, Proteins › View

What molecule is substituted in place of thymine during transcription?

A. Adenine

B. Guanine

C. Cytosine

D. Uracil

---

Hele Skeletal System › View

What happens to bones in space?

A. They become stronger

B. They lack Calcium

C. The grow bigger

D. They weaken

---