| What to create | Exam |
| Which subject | Biology |
| What age group | Year or Grade 11 |
| What topic | Menelian Genetics, Protein Synthesis, Enzymes, genotypes, phenotypes, lactose intolerance, meiosis |
| Question types | Close-ended |
| Number of questions | 20 |
| Number of answers | 4 |
| Correct answers | Exactly 1 |
| Show correct answers | |
| Use images (descriptions) | |
| Any other preferences |
Answer the following questions by selecting the most appropriate answer choice. Each question has one correct answer.
What is the basic unit of heredity in an organism?
A. Protein
B. Gene
C. Chromosome
D. Allele
In which part of the cell does protein synthesis occur?
A. Nucleus
B. Ribosome
C. Mitochondria
D. Lysosome
Which of the following genotypes represents a homozygous recessive individual for a given trait?
A. AA
B. Aa
C. aa
D. Aaa
What is the phenotype of an organism?
A. Its genetic composition
B. Its observable characteristics
C. The RNA produced in cells
D. The number of chromosomes
Which statement is true about lactose intolerance?
A. It results from an overproduction of lactose
B. It is caused by a deficiency in the enzyme lactase
C. It only affects children
D. It is inherited as a dominant trait
What is the primary role of enzymes in biological processes?
A. To store genetic information
B. To speed up chemical reactions
C. To provide energy to cells
D. To transport nutrients in the blood
Which process results in the formation of gametes?
A. Mitosis
B. Meiosis
C. Binary fission
D. Budding
Which of the following is an example of a Mendelian trait?
A. Height in humans
B. Blood type
C. Skin color
D. Flower color in pea plants
What is the transcription process in protein synthesis?
A. Translation of mRNA into amino acids
B. Synthesis of DNA from RNA
C. Production of mRNA from DNA
D. Formation of proteins from amino acids
Which of the following represents a dihybrid cross?
A. Aa x Aa
B. AABB x aabb
C. AaBb x AaBb
D. A x A
Which of the following is an example of a codon?
A. AUG
B. AGU
C. UAA
D. All of the above
What occurs during the anaphase stage of meiosis?
A. Chromosomes line up at the equatorial plane
B. Homologous chromosomes are separated
C. DNA replication occurs
D. Cells divide into two identical daughter cells
If a tall plant (Tt) is crossed with a short plant (tt), what percentage of the offspring would expected to be tall?
A. 100%
B. 75%
C. 50%
D. 25%
What is the role of ribosomes in the cell?
A. To break down waste products
B. To generate ATP
C. To synthesize proteins
D. To replicate DNA
In humans, the allele for brown eyes (B) is dominant over the allele for blue eyes (b). What is the probability of a child having blue eyes if both parents are heterozygous (Bb)?
A. 0%
B. 25%
C. 50%
D. 75%
What term describes the physical location of a gene on a chromosome?
A. Allele
B. Locus
C. Genotype
D. Phenotype
Which enzyme is responsible for unwinding DNA during replication?
A. DNA polymerase
B. Helicase
C. Ligase
D. RNA polymerase
Which of the following is a characteristic of recessive alleles?
A. They are always expressed in the phenotype
B. They only manifest in homozygous conditions
C. They can mask the effects of dominant alleles
D. They are more common in the population
During which phase of meiosis does crossing over occur?
A. Metaphase I
B. Prophase I
C. Anaphase I
D. Telophase I
How many chromosomes are present in human gametes?
A. 23
B. 46
C. 22
D. 92
Good luck!