Q: Which equation correctly represents the process of cellular respiration in eukaryotes?

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy}$$

Question 1

Which of the following best describes the primary difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus enclosed by a membrane, whereas prokaryotic cells lack a true nucleus.

Question 2

Water is essential for life due to its unique chemical properties. Which property of water allows it to moderate Earth's climate?

Accepted Answer

Its high heat of vaporization

Question 3

Which equation correctly represents the process of cellular respiration in eukaryotes?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{energy}$$

Question 4

A mutation occurs in the gene coding for the enzyme DNA polymerase. Which cellular process would be most directly affected?

Accepted Answer

DNA replication

Question 5

Which of the following best explains why phospholipids form bilayers in biological membranes?

Accepted Answer

Phospholipids have both hydrophilic heads and hydrophobic tails, causing them to arrange in bilayers.

Question 6

A plant cell is placed in a solution with a lower solute concentration than its cytoplasm. What will happen to the cell?

Accepted Answer

Water will enter the cell, causing it to become turgid.

Question 7

Which of the following is a correct statement about Mendelian genetics?

Accepted Answer

Dominant alleles mask the expression of recessive alleles in heterozygotes.

Question 8

Which process is responsible for the synthesis of ATP during photosynthesis?

Accepted Answer

Chemiosmosis in the thylakoid membrane

Question 9

A population of beetles shows variation in shell color. Over time, birds preferentially eat beetles with lighter shells. Which evolutionary mechanism is most likely at work?

Accepted Answer

Natural selection

Question 10

Which of the following best describes the role of ribosomes in the cell?

Accepted Answer

Ribosomes are responsible for protein synthesis by translating mRNA.

Question 11

Which formula represents the Hardy-Weinberg equilibrium for allele frequencies in a population?

Accepted Answer

$$p^2 + 2pq$$ + $$q^2 = 1$

Question 12

A patient is unable to break down lactose due to a deficiency in the enzyme lactase. Which biological macromolecule is directly involved in this process?

Accepted Answer

Proteins

Question 13

Which of the following is a function of the plant hormone auxin?

Accepted Answer

Stimulates cell elongation in stems

Question 14

Which process is responsible for the movement of water from roots to leaves in vascular plants?

Accepted Answer

Transpiration and cohesion-tension mechanism

Question 15

Which of the following best explains the function of antibodies in animal defense?

Accepted Answer

Antibodies bind to antigens, marking them for destruction by other immune cells.

Question 16

Which equation describes the net photosynthetic reaction in plants?

Accepted Answer

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 17

A scientist observes that a population of frogs in a pond has decreased dramatically after a chemical spill. Which ecological concept does this scenario best illustrate?

Accepted Answer

Disturbance and its effect on population dynamics

Question 18

Which of the following is a correct statement about meiosis?

Accepted Answer

Meiosis reduces the chromosome number by half, resulting in haploid gametes.

Question 19

Which of the following best describes the role of decomposers in an ecosystem?

Accepted Answer

Decomposers recycle nutrients by breaking down dead organic matter.

Question 20

A patient is diagnosed with sickle cell anemia, a genetic disorder caused by a single nucleotide mutation in the hemoglobin gene. Which type of mutation is most likely responsible?

Accepted Answer

Point mutation

General Biology: Major Topics and Chapter Overview

Guida di studio - Domande di pratica

Study guide - Flashcard