Quizs Biology Midterm Review 24-25

What is structure "D "in eukaryotic cells that is the site of cellular respiration?

• nucleus

• cytoplasm

• mitochondria

• cytoplasm

What are the ecological levels of organization from smallest to the largest?

• organism, population, community, ecosystem, biome, biosphere
• organism, community, population, ecosystem, biome, biosphere
• organism, population, community, biome, ecosystem, ecosphere.
• organism, community, population, biome, ecosystem, ecosphere

How nitrogen is "fixed" into useable form for plants...

• through action of bacteria only

• through lightning only

• through action of bacteria & lightning

• through photosynthesis

Answer explanation

Nitrogen is fixed into a usable form for plants through the action of bacteria in the soil and by lightning, which converts atmospheric nitrogen into compounds that plants can absorb. Thus, the correct answer is through action of bacteria & lightning.

What are the monomers (building blocks) of PROTEINS?

• Monosaccharides (simple sugars)
• Amino Acids
• Nucleotides
• Triglycerides/No true monomer

What type of consumer is the shrew?

• secondary consumer

• primary consumer

• tertiary consumer

• Answer choices A&B

Answer explanation

The shrew is classified as a secondary consumer because it primarily feeds on primary consumers like insects and other small animals, placing it in the second trophic level of the food chain.

What is shown here?

• Lysogenic Cycle

• Lytic Cycle

• Binary Fission

• Conjugation

Answer explanation

The Lytic Cycle is a viral replication process where the virus infects a host cell, replicates, and causes the cell to burst, releasing new viruses. This distinguishes it from the Lysogenic Cycle, which integrates viral DNA into the host's genome.

What is the function of the organelle labeled "6"?

• Provides a suitable environment necessary for other organelles to carry out biochemical reactions.

• Production of RNA and Ribosomes.

• Creates membrane for vesicles to transport proteins.

• Packages and ships proteins and lipids

Which of the following statements is the best conclusion for the graph?

• The population is decreasing overtime because of competition between organisms.

• The population has reached its carrying capacity.

• The population is increasing because of competition for limited space

• The population is increasing because of unlimited food and shelter.

Answer explanation

The correct choice indicates that the population is increasing due to unlimited food and shelter, suggesting favorable conditions for growth, unlike the other options which imply limitations or competition.

The _________ of the phospholipids in a cell membrane face inward towards each other because they are ___________.

• heads, hydrophobic

• heads, hydrophilic

• tails, hydrophobic

• tails, hydrophilic

Answer explanation

The tails of phospholipids are hydrophobic, meaning they repel water. Therefore, they face inward towards each other, while the hydrophilic heads face outward, interacting with the aqueous environment.

Which of the following best describes facilitated diffusion?

• Movement of molecules across cell membranes through protein channels without energy

• Transport of molecules against their concentration gradient with energy

• Diffusion of water molecules through a semi-permeable membrane

• Active transport of ions through voltage-gated channels

Answer explanation

Facilitated diffusion is the process where molecules move across cell membranes via protein channels without the use of energy, making the first answer choice the correct description.