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Biology STAAR 2021

Authored by PHHS Zapata

Biology

9th Grade

B covered

Used 13+ times

Biology STAAR 2021
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50 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 2 pts

During the cell cycle, proteins called cyclins bind to enzymes that send signals for the cell to progress through stages of cell replication. At the end of this cycle, the cyclins degrade to prevent further signaling for the cell to divide.

Uncontrolled production of cyclins will most likely result in —

the formation of tumors

the immediate death of the cell

the transfer of cyclins to other cells

the formation of haploid cells

Tags

B.5(C)

2.

MULTIPLE CHOICE QUESTION

2 mins • 2 pts

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The life cycle of a frog is illustrated in the diagram.

Which statement best explains how the cell cycle is important to the life cycle of the frog?

It enables frogs to produce tadpoles that are clones.

It allows frogs to grow, develop, and reproduce.

It prevents overproduction of frog offspring.

It ensures the best adapted frogs survive and pass on traits to offspring.

Tags

B.5(A)

3.

MULTIPLE CHOICE QUESTION

2 mins • 2 pts

Students created note cards comparing characteristics of eukaryotic and prokaryotic cells. Which set of note cards most accurately compares these cells?

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Tags

B.4(A)

4.

MULTIPLE CHOICE QUESTION

2 mins • 2 pts

Which statement describes the process of osmosis in an animal cell?

Sugar molecules move across the plasma membrane until the cell has enough energy to grow in size and divide.

Water molecules move across the plasma membrane until solute concentrations are equal on both sides of the membrane.

Ions move across the plasma membrane until the inside of the cell has a higher concentration of positive charges.

Enzymes move across the plasma membrane until the cell has completed metabolism.

Tags

B.4(B)

5.

MULTIPLE CHOICE QUESTION

2 mins • 2 pts

Environmental factors typically activate genes in a cell by causing the cell to —

produce identical daughter cells through mitosis

form haploid gamete cells through meiosis

fuse with another cell to increase the size of its genome

transcribe specific DNA segments to mRNA for translation

Tags

B.5(B)

6.

MULTIPLE CHOICE QUESTION

2 mins • 2 pts

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Materials are provided to students to build models of a prokaryotic cell, a eukaryotic cell, and a virus. The materials and the structures they represent are listed in the table shown.

Which material will students use in all three models?

Yellow paper oval

Gray paper hexagon

Blue yarn

Purple buttons

Tags

B.4(C)

7.

MULTIPLE CHOICE QUESTION

2 mins • 2 pts

Which table correctly identifies how the plasma membrane contributes to the maintenance of cellular homeostasis?

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Tags

B.4(B)

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