2021 Biology STAAR Practice

Students created note cards comparing Eukaryotic and prokaryotic cells. Which set is most accurate?

• F

• G

• H

• J

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

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,

• Enzymes move across the plasma membrabe.

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

• A

• B

• C

• D

Tags

NGSS.HS-LS1-3

Materials are provided to students to build models of prokaryotic cell, eukaryotic and a virus. The materials and the structures they represent are listed in the table shown. (Click if too small to see) WHICH material will students use in all 3 models?

• Yellow paper oval

• Gray paper hexagon

• Blue yarn

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Which conclusion about the HIV (virus) infection of a host cell is best supported by the diagram?

• It takes place outside of living cells

• It relies on the host cell to reproduce.

• It involves the process of meiosis

• It requires carbon dioxide

A virus transmitted by mosquitoes occurs quickly within 3 to 12 days when contracted. There is no vaccine. Which description best explains the reproductive cycle of this virus?

• Lytic because the virus is transmitted by mosquitoes

• Lysogenic, because there is no way to vaccinate against it.

• Lytic, because of the quick incubation time.

• Lysogenic, because the virus causes a fever.

The life cycle of a frog is illustrated. (Click to see) 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

NGSS.HS-LS1-4

Which statement best describes why a cell spends the majority of its time in interphase during the cell cycle?

• The cell is growing and carrying out processes such as metabolism and DNA replication.

• The cell is aging and process are stopping as lysosomes clear dead cell matter away.

• The cell needs time to synthesize spindle fibers.

• The cell needs time to complete ctyokinesis.

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

NGSS.HS-LS3-2

During the cell cycle, proteins called cyclins bind to enzymes. Uncontrolled production of cyclins will most likely result in -

• the formation of tumors (cancer)

• the immediate death of the cell

• the transfer of cyclins to other cells

• the formation of haploid cells

Tags

NGSS.HS-LS1-4