Bio 1 Warm-up Quiz #9

Hydrogen bonds are responsible for giving water many properties that are important to living things. These bonds occur between the positively charged hydrogen atoms of one water molecule and the negatively charged oxygen atoms of neighboring water molecules. This results in water's high boiling point, surface tension, and cohesion, which are crucial for various biological processes such as maintaining stable body temperature, transporting nutrients, and supporting cell structure.

In step 2 of the lock-and-key model of enzyme function, the enzyme is creating bonds between the substrates. This means that the enzyme is facilitating the formation of chemical bonds between the substrates, which is a crucial step in the catalyzed reaction. This process allows the substrates to come together and react more easily, increasing the efficiency of the reaction.

The abiotic characteristics of the habitat changed. This explanation suggests that the transformation of the mountain pond into a meadow was likely due to changes in the non-living factors of the environment, such as temperature, soil composition, or water availability. These changes would have created a new set of conditions that favored the growth and survival of different organisms, leading to the replacement of the older communities with new ones.

During the last part of M phase in an animal cell, the cleavage furrow would begin developing. The cleavage furrow is a shallow groove that forms around the cell's equator during cytokinesis. It is responsible for dividing the cytoplasm into two daughter cells. This process is crucial for the completion of cell division and the formation of two genetically identical daughter cells. The other options, such as signs of decomposing, spindle fibers, and cell plate, are not associated with the last part of M phase in an animal cell.

When graphing experimental results, the dependent variable should be placed on the y-axis. The dependent variable is the variable that is being measured or observed and is expected to change as a result of manipulating the independent variable. The y-axis represents the vertical axis on a graph and is used to plot the values of the dependent variable. By placing the dependent variable on the y-axis, we can visually represent the relationship between the independent variable and the dependent variable.

Transport proteins are involved in both passive and active transport. Passive transport refers to the movement of molecules across a cell membrane without the use of energy, while active transport requires energy to move molecules against their concentration gradient. Transport proteins facilitate the movement of molecules across the cell membrane in both of these processes.

Exocytosis is the correct answer because it is a process by which cells can remove large amounts of material. During exocytosis, vesicles within the cell fuse with the plasma membrane and release their contents outside of the cell. This allows the cell to eliminate waste products, release hormones or neurotransmitters, and secrete substances such as enzymes or mucus.

The structure shown in the diagram is likely a cell membrane. The cell membrane plays a crucial role in regulating what goes in and out of a cell. It acts as a barrier, controlling the movement of substances such as ions, nutrients, and waste products. This regulation ensures that the cell maintains its internal environment and allows for proper functioning.

The statement "New cells are produced by division of existing cells" supports the cell theory as it is stated today. The cell theory states that all living organisms are composed of cells, cells are the basic unit of structure and function in living organisms, and new cells are produced by existing cells. This statement aligns with the idea that cells can only arise from pre-existing cells through cell division, which is a fundamental principle of the cell theory.

The structures labeled B would be made up of protein because protein is a macromolecule that is involved in various structural functions in living organisms. Proteins are made up of amino acids and can form complex structures such as enzymes, antibodies, and structural components of cells and tissues. Therefore, it is likely that the structures labeled B would be composed of protein.