What is the mean pH value of tears ? 

Which of the following are threadlike structures in the nucleus making up of proteins wrap around DNA? 

What is the membrane that covers the front surface of the eye and inner surface of the lids? 

Organelles called lysosomes are also referred to as a “digestive cells”. 

Which of the following is not one of the four elements? 

Which of the following is a measure of the H+ concentration? 

Which of the following is the best description for cytoplasm? 

Which of the following is a thin, sheet-like structure that covers and protect the body surface, line body cavities, and covers the inner surfaces of the organs? 

Which of the following organelle is the “powerhouse” and it’s function is ATP synthesis?

Glucose is an important monosaccharide in the body, cells use it as their primary energy source.