Amoeba Sisters Video Recap: Enzymes

Answer:A, B, C

Explanation:

A. The arrangement of phospholipids occurs in bilayers with the polar head groups facing both the extracellular and cytoplasmic sides, while the hydrophobic core remains in the center.

The plasma membrane also consists of membrane proteins.

B. Certain integral proteins function as transmembrane proteins that traverse the membrane and create a hydrophilic channel, specifically selective for certain solutes like enzymes, antigens, and hormones.

Peripheral proteins are located on the surface of the bilayer and act as signaling proteins.

C. Membrane lipid bilayers are not rigid or fixed. They exhibit free lateral movement of their components, thus the membrane is fluid in nature. This fluidity facilitates processes like endocytosis and exocytosis.

Answer:

- There is a high likelihood that temperatures exceeding 35°C will alter the enzyme's structural configuration, leading to denaturation and impairing its functional abilities.

- Based on the data provided, the most likely impact on this rice crop is a reduction in its starch content in comparison to crops cultivated under optimal temperature conditions.

Explanation:

The complete question includes the following statement:

A rice grain is a fruit containing a seed. The majority of a rice grain’s dry mass is starch. Starch synthesis in rice plants occurs through the hydrolysis of sucrose followed by the linking of the released glucose molecules to form starch. The ideal temperature range for starch synthase operation in a specific rice strain is between 27°C and 30°C. Similarly, the ideal temperature range for sucrose synthase in this strain is from 30°C to 35°C.

Temperature is a key factor influencing enzyme activity, which can accelerate, decelerate, or inhibit enzymatic functions.

For rice grains to develop their starch content, the action of two enzymes is crucial: sucrose synthase, which disengages glucose from sucrose, and starch synthase, which polymerizes glucose into starch (as seen in the image).

How do temperatures above 35°C likely impact the structure and function of starch synthase in this strain?

A temperature of 35°C significantly surpasses the optimal range required for the enzyme's activity, indicating a potential change in its structure or denaturation that would hinder starch synthase's function. A key consequence of this would be a decreased rate of starch synthesis.

What predictions can be made regarding the starch content in mature rice grains if the average growing season temperature is 33°C?

A temperature of 33°C is beyond the starch synthase activity range—even though it's still favorable for sucrose synthase—which is likely to lead to reduced starch synthesis, resulting in this crop's rice grains containing less starch overall.

More information:

Connection between enzyme reaction velocity and temperature brainly.com/question/14198802

Not sure, maybe just look it up online, that should be effective.

Answer:

The respiratory system is comprised of specialized organs and structures for gas exchange in both animals and plants. The structure and function of this system differ significantly based on the organism's size, habitat, and evolutionary background. In terrestrial animals, the respiratory surfaces are typically the linings of the lungs. In mammals and reptiles, gas exchange occurs within millions of tiny air sacs known as alveoli, while birds have atria for this process. These tiny air sacs boast an extensive blood supply, ensuring air comes into close proximity with the bloodstream. They connect to the outer environment through airways or hollow tubes, with the trachea being the largest that divides in the chest into two primary bronchi. These then branch further into successively narrower secondary and tertiary bronchi, eventually leading to numerous smaller tubes called bronchioles. In birds, these are referred to as parabronchi. The air needs to be drawn into the alveoli or atria from the outside through the act of breathing, which involves respiratory muscles.

Explanation:

The potato does not increase in size because it is only a segment of the plant. Water absorbed from the soil is taken up by the roots and transported to other parts like leaves, but the potato itself does not directly absorb water from the soil.