Biology Quiz

Blood is a mixture of a variety of materials. Some of the materials are dissolved in the fluid portion of blood. Other materials, such as blood cells, do not dissolve but move along with the blood.For these reasons, blood is an example of which type of mixture?

• A. A solvent

• B. A solution

• C. A suspension

• D. A buffer

Very long and large organic molecules called ______ are made of small units called ______. Examples of the small units include sugars, which combine to form ______; nucleotides, which form ______; and amino acids, which form ______.

• A. polymers, monomers, carbohydrates, nucleic acids, proteins

• B. monomers, polymers, proteins, carbohydrates, nucleic acids

• C. nucleic acids, proteins, monomers, polymers, carbohydrates

• D. carbohydrates, nucleic acids, proteins, monomers, polymers

The cell walls of a plant consist mostly of cellulose, a carbohydrate, which provides a strong structure. The cell membrane gets its structure primarily from lipids, and embedded proteins allow for material transport. Which of the following elements would be found in the lowest amounts in both the cell wall and cell membrane?

• Carbon

• Phosphorus

• Hydrogen

• Sodium

A store sells a variety of sets for building molecular models. The sets are described by the diagram below. Each circled letter represents a set of 6 model atoms of one element. For example, the circled letter 'P' represents a set with 6 model phosphorus atoms. Kendra wishes to build a model of a carbohydrate molecule, ideally containing as many monomers as possible. Which set should she choose?

• Set 1

• Set 2

• Set 3

• Set 4

Which are the main points of the cell theory? Select all that apply.

• Cells are the basic units of structure and function in living things.

• New cells are produced from existing cells.

• All cells enclose their DNA within a nucleus.

• All living things are made up of cells.

The invention of which instrument led to the development of cell theory?

• Eyeglasses

• Magnifying glass

• Microscope

• Telescope

The illustrations in the options are models of cells and cell organelles. Which model shows a prokaryotic cell?

• Model A

• Model B

• Model C

• Model D

Read the statements describing prokaryotic cells and/or eukaryotic cells. 1. Contain DNA at some point in their life cycle. 2. Contain nuclei. 3. Are surrounded by a cell membrane. 4. Were the first photosynthetic organisms on Earth. 5. Can be specialized for specific tasks in multicellular organisms. Choose the option that correctly pairs each statement with a description of a prokaryotic cell or a eukaryotic cell. Some statements may be used for both.

• Prokaryotic: 2, 3, 4, 5; Eukaryotic: 1, 3

• Prokaryotic: 1, 3, 4; Eukaryotic: 1, 2, 3, 5

• Prokaryotic: 1, 2, 3, 5; Eukaryotic: 1, 3, 4

• Prokaryotic: 2, 3, 4; Eukaryotic: 1, 2, 4, 5

The instructions for making proteins are coded in the ___ of a cell. In a eukaryotic cell, these instructions are located in the ___.

• mitochondria; ribosome

• DNA; nucleus

• cytoplasm; cytoskeleton

• nucleus; endoplasmic reticulum

• endoplasmic reticulum; nucleus

Which of the following are functions of lipids?Choose three correct answers.

• 1. Lipids form waxy leaf coverings.

• 1. Lipids form bones and cartilage.

• 1. Lipids store energy in fat cells.

• 1. Lipids form cell membranes.

• 1. Lipids carry genetic information.