Category 1 EOC Qs

B.4.A

The picture shows a student using a microscope to study a prepared slide of a single-celled organism. A single-celled organism can be classified as a prokaryote based on the absence of -

• a cell membrane

• ribosomes

• chromosomes

• a nucleus

B.4.A

Some students used information they gathered from lab investigations to prepare a table. They entered the table in their lab notebooks.

Which of these correctly identifies the two cells described in the table?

• cell 1 is a eukaryotic, and cell 2 is prokaryotic

• cell 1 is prokaryotic, and cell 2 is eukaryotic

• both cell 1 and cell 2 are eukaryotic

• both cell 1 and cell 2 are prokaryotic

B.4.B

Cells can generate as many as 36 - 38 molecules of adenosine triphosphate (ATP) from the metabolism of one molecule of glucose. Which cellular process results in this amount of ATP production

• Anaerobic cellular respiration

• Protein synthesis

• Aerobic cellular respirtaion

• Photosynthesis

B.4.B

Some students used vinegar to dissolve away the shells of three eggs and used these eggs as models of human red blood cells. The students observed the changes in the eggs when they were places in different solutions.

Which statement best describes the role of the cell membrane in this model?

• The cell membrane is an impermeable barrier that prevents water from entering the cell

• The cell membrane allows solutes to enter the cell, which causes the cell to shrink.

• The cell membrane allows water to enter and leave the cell.

• The cell membrane removes solutes from the environment.

B.4.C

A photograph of a virus is shown below. The projections on the surface of this virus allow the virus to -

• move inside a host cell

• attach to a host cell

• control a host cell's DNA

• signal other viruses to infect a host cell

B.4.C

The picture shows a 3D model of a virus called a bacteriophage. Bacteriophages can infect bacteria such as E. coli. In what way are the bacteriophage and E. coli alike?

• they contain antibodies

• they reproduce by mitosis

• they have identical genomes

• they lack membrane bound organelles

B.5.A

A photomicrograph of onion root tip cells during mitosis is shown below. Which phase of mitosis is occurring in the cell indicated by the arrow?

• prophase

• metaphase

• anaphase

• telophase

B.5.A

The model represents the change in the DNA content of a cell during the cell cycle. Which part of the model represents the S phase?

• I

• II

• III

• IV

B.5.B

Most plants have hair-like cells called trichomes that project from the surface and help the plants in many ways. In some plants trichomes secrete toxic substances that most likely perform which function?

• absorb carbon dioxide

• protect against herbivorous insects

• reflect light off leaves

• reduce water loss from evaporation

B.5.B

Some components of cells are listed. Which of the components could be observed using a microscope in a prepared slide of leaf epidermal cells but not in a prepared slide of human cheek cells?

• components 2 and 3 only

• components 3 and 4 only

• components 1, 2, and 3 only

• components 1 and 5 only