Life at Cellular and Molecular Level Practice Questions 2025

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose, using carbon dioxide and water, and releasing oxygen as a byproduct.

Front

What is cellular respiration?

Back

Cellular respiration is the process by which cells convert glucose and oxygen into energy (ATP), carbon dioxide, and water.

Front

What is the relationship between photosynthesis and cellular respiration?

Back

Photosynthesis produces glucose and oxygen, which are used in cellular respiration to generate energy.

Front

What are prokaryotic cells?

Back

Prokaryotic cells are single-celled organisms that lack a nucleus and membrane-bound organelles, such as bacteria.

Front

What are eukaryotic cells?

Back

Eukaryotic cells are complex cells that contain a nucleus and membrane-bound organelles, and can be unicellular or multicellular organisms.

Front

How do prokaryotic and eukaryotic cells differ in function?

Back

A prokaryotic cell performs all functions needed by the organism, while eukaryotic cells are specialized, dividing the functions among them for the entire organism.

Front

What is the optimal pH for the enzyme Trypsin?

Back

The optimal pH for the enzyme Trypsin is 8.

Front

What is the optimal temperature for the enzyme Trypsin?

Back

The optimal temperature for the enzyme Trypsin is 38°C.

Front

What did Erwin Chargaff discover about DNA?

Back

Erwin Chargaff discovered that the percentage of adenine in DNA equals the percentage of thymine, and the percentage of cytosine equals the percentage of guanine.

Front

What technique did Rosalind Franklin use to study DNA?

Back

Rosalind Franklin used X-ray diffraction to take a picture of DNA.