7th Grade Science Assessment Name



7th Grade Science Assessment Name______________________

RIO Unit 13- Cells, Inheritance, DNA

1. What packages a molecule of DNA?

A. nucleus

B. Chromosome

C. Gamete

D. Diploid

2. What choice below that best shows various types of genetic material in order from simplest to most complex?

A. genome( chromosome (gene

B. chromosome( genome( gene

C. gene( chromosome (genome

D. gene (genome (chromosome

3. What choice best completes the following sentence?

A normal human has a total of ___ chromosomes: ___ chromosomes come from the mother and ___ chromosomes came from the father.

A. 50,25,25

B. 23,11,12

C. 46,23,23

D. 23,12, 11

4. What are the instructions, or code, that are responsible for all of the inherited traits of an organism?

A. Is formed after an organism are fully grown.

B. are stored within the cell membrane of cells.

C. are held in genetic material called DNA

D. are passed from the offspring to the parent.

5. What can be described as alternate forms of a particular gene?

A. Alleles

B. Chromosomes

C. DNA molecules

D. chromatids

6. What can be defined as a basic unit of hereditary information which refers to a specific segment of DNA that influences a particular trait or group of traits?

A. Gamete

B. Gene

C. Zygote

D. Chromosome

7. What is a DNA molecule shaped like?

A. Long, thin rod

B. Spiral staircase

C. Straight ladder

D. Triple helix

8. During DNA replication, what does adenine (A) always pair with?

A. Guanine (G)

B. Cytosine (C)

C. Thymine (T)

D. Adenine (A)

9. What is the function of a cell membrane?

A. To support the cell

B. To perform different functions in each cell

C. To control what enters and leaves the cell

D. To form a hard outer covering for the cell.

10. Which of the following best describes the function of the mitochondria?

A. They convert energy from food molecules into energy the cell can use.

B. They store energy from food molecules

C. They store energy from sunlight

D. They produce nucleic acids that release energy.

11. Which organelle is the control center of a cell?

A. Mitochondrion

B. Ribosome

C. Nucleus

D. Chloroplast

12. What is each rung of the DNA ladder is made of?

A. A single nitrogen base.

B. A pair of nitrogen bases.

C. Three nitrogen bases

D. Four nitrogen bases.

13. Why is water important for a cell?

A. Water is the main ingredient in DNA

B. All proteins are made of water.

C. Most chemical reactions in cells require water.

D. Water gives the cell energy

14. What are the cell membrane and water are both involved in?

A. Directing the cell’s activities

B. Making chloroplasts.

C. The movement of materials into and out of the cell.

D. Preventing chemical reactions from taking place.

18. Which combination of sex chromosomes results in a male human being?

A. XX

B. XY

C. YY

D. Either XX or YY

19. What is the order in which cells are put together to form a tissue?

A. .

B. Phospahates are arranged in DNA

C. Amino acids are put together to form a protein

D. Chromosomes are arranged in the nucleus

20. When sex cells combine to produce offspring, what will each sex cell (egg- female) (sperm- male) contribute?

A. One foruth ¼ the number of chromosomes in body cells

B. Half ½ the number of chromosomes in body cells

C. The normal number of chromosomes in body cells

D. Twice the number of chromosomes in body cells

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