Cell Biology end of unit test HL

The giant marine alga Halicystis ovalis is able to move sodium ions from vacuoles to the surrounding seawater through active transport. Which condition or feature is required for this mode of transport?

• Movement from a region of higher sodium concentration to a region of lower sodium concentration

• A partially permeable surface

• Membrane fluidity

• Transmembrane proteins

What is the process shown in this image?

• Binary fission of a prokaryotic cell

• Telophase II in a eukaryotic cell

• End of mitosis in a prokaryotic cell

• Cytokinesis of a eukaryotic cell

What can be deduced about a striated muscle fibre from both of these statements?

• It is prokaryotic.

• It is an exception to cell theory.

• It consists of aseptate hyphae.

• It is preparing to divide.

The diagram shows a plasma membrane.

Which molecule is labelled X?

• Cholesterol

• Glycoprotein

• Phospholipid

• Amylase

What structures are part of an Escherichia coli cell?

• Ribosomes, nucleoid and Golgi apparatus

• Ribosomes, mitochondria and pili

• Cell wall, plasma membrane and nuclear membrane

• Pili, flagella and cytoplasm

What distinguishes prokaryotic cells from eukaryotic cells?

• A

• B

• C

• D

Where are proteins synthesized by free ribosomes used?

• Outside the cell after secretion

• Within the nucleus

• Within the lysosomes

• Within the cytoplasm

Which of the following processes take place during interphase in animal cells?

I. Spindle formation

II. Transcription and translation

III. Increase in numbers of mitochondria

• I only

• I and II only

• II and III only

• I, II and III

Which are functions of membrane proteins?

• Hormone binding sites and DNA replication

• Cell adhesion and translation

• Cell to cell communication and protein pumps

• Passive transport and glycolysis

In the electron micrograph of a rat liver cell below, what are the structures labelled X and Y?

• A

• B

• C

• D