Midterm Review-7th Grade-2024

Front

What is the structure of DNA?

Back

DNA is a double helix structure composed of two strands that wind around each other.

Front

What is RNA and how does it differ from DNA?

Back

RNA is single-stranded and contains ribose sugar, while DNA is double-stranded and contains deoxyribose.

Front

What is a qualitative observation?

Back

A qualitative observation describes characteristics or qualities that cannot be measured numerically, such as color or texture.

Front

What is a quantitative observation?

Back

A quantitative observation involves measurements and numbers, such as '5 apples' or '10 cm'.

Front

What phase of cell division is Metaphase?

Back

Metaphase is the stage in cell division where chromosomes align in the middle of the cell before being separated.

Front

What is the function of the central vacuole in a plant cell?

Back

The central vacuole stores nutrients and waste products, helps maintain turgor pressure, and supports the cell.

Front

What are the components of a DNA nucleotide?

Back

A DNA nucleotide consists of a phosphate group, a deoxyribose sugar, and a nitrogenous base (adenine, thymine, cytosine, or guanine).

Front

What is the role of ribosomes in a cell?

Back

Ribosomes are the sites of protein synthesis, where amino acids are assembled into proteins.

Front

What is the difference between prokaryotic and eukaryotic cells?

Back

Prokaryotic cells lack a nucleus and membrane-bound organelles, while eukaryotic cells have a nucleus and organelles.

Front

What is the purpose of mitosis?

Back

Mitosis is the process of cell division that results in two identical daughter cells, important for growth and repair.