1. Which of the following is a MAJOR consequence of a stroke?

A. Irregular heart rhythm.
B. Rapid weight gain or loss.
C. Brain damage due to interrupted blood flow.
D. Chronic fatigue and muscle weakness.

Correct answer: C

Rationale: The correct answer is C: 'Brain damage due to interrupted blood flow.' A stroke occurs when there is a sudden interruption in the blood supply to the brain, leading to brain damage. This interruption can result in various consequences such as paralysis, speech and vision problems, cognitive impairments, and in severe cases, even death. Other options like 'Irregular heart rhythm' (A) and 'Chronic fatigue and muscle weakness' (D) can be associated with health conditions but are not direct consequences of a stroke. 'Rapid weight gain or loss' (B) is typically not a major consequence of a stroke compared to the significant impact of brain damage.

2. A car accelerates from rest. What happens to its kinetic energy and work done on it?

A. Both kinetic energy and work done increase
B. Kinetic energy increases, but work done remains constant.
C. Work done increases, but kinetic energy remains constant.
D. Both kinetic energy and work done remain constant.

Correct answer: A

Rationale: During acceleration, the car's speed increases, leading to rising kinetic energy. Simultaneously, the force applied to accelerate the car does work on it, increasing the work done.

3. What property of a substance remains constant regardless of its location in the universe?

A. Mass
B. Weight
C. Density
D. Volume

Correct answer: a

Rationale: Mass is an intrinsic property of matter that remains constant regardless of its location in the universe.

4. What is the difference between a homozygous recessive genotype and a homozygous dominant genotype?

A. Both have the same phenotype, but different genotypes.
B. Both have the same genotype, but different phenotypes.
C. Homozygous recessive has two dominant alleles, while homozygous dominant has two recessive alleles.
D. Homozygous recessive has two identical recessive alleles, while homozygous dominant has two identical dominant alleles.

Correct answer: D

Rationale: Rationale: - Homozygous recessive genotype refers to an individual having two identical recessive alleles for a particular gene (e.g., rr for a trait where r represents the recessive allele). - Homozygous dominant genotype refers to an individual having two identical dominant alleles for a particular gene (e.g., RR for a trait where R represents the dominant allele). - The difference between the two genotypes lies in the specific alleles present in each case, with homozygous recessive having two recessive alleles and homozygous dominant having two dominant alleles. - This genetic difference results in different phenotypes being expressed, as the dominant allele typically masks the expression of the recessive allele in heterozygous individuals.

5. Which of the following functional groups is present in carboxylic acids?

A. Carbonyl
B. Hydroxyl
C. Carboxyl
D. Aldehyde

Correct answer: C

Rationale: Carboxylic acids contain the carboxyl functional group (-COOH). The other choices are associated with different functional groups.

6. The phrase "massive open online courses" (MOOCs) refers to

A. Online learning platforms designed specifically for students with disabilities.
B. University-level courses freely available to anyone with an internet connection.
C. Interactive training modules aimed at developing job-specific skills and knowledge.
D. Online resources offering personalized learning experiences tailored to individual needs.

Correct answer: B

Rationale: MOOCs by definition are open and accessible courses, aligning with B.