Question
How do autotrophs living in an aquatic ecosystem obtain carbon?
A. By diffusion of dissolved carbon dioxide and hydrogen carbonate ions
B. By feeding on heterotrophs and obtaining carbon from carbohydrates
C. By active transport of carbon dioxide directly from the atmosphere
D. By ingesting organisms with carbonate shells
▶️Answer/Explanation
Ans. A
Question
How is a prokaryotic cell different from a eukaryotic cell?
A. Eukaryotic cells are compartmentalized, whereas prokaryotic cells are not.
B. Prokaryotic cells do not contain ribosomes, whereas eukaryotic cells do.
C. Eukaryotic cells contain DNA, whereas prokaryotic cells do not.
D. Prokaryotic cells have a cell wall, whereas eukaryotic cells do not.
▶️Answer/Explanation
Ans: A
Question
An animal has the following characteristics: bilateral symmetry, mouth but no anus, ribbon shape. Which phylum does the animal belong to?
Mollusca
Cnidaria
Annelida
Platyhelmintha
Answer/Explanation
Ans: D
Question
The images show a structure found on members of a phylum of green plants.
What is the name of the phylum to which the organisms belong?
Coniferophyta
Angiospermophyta
Filicinophyta
Bryophyta
Answer/Explanation
Ans: A
Question
A locust is an arthropod. For invertebrate groups, which recognition feature is found only in arthropods?
Bilateral symmetry
Jointed appendages
Wings
Segmented body
Answer/Explanation
Ans: B
Which is a characteristic of both bryophyta and filicinophyta?
A. Vascular tissue
B. Membranous leaves
C. Release of spores
D. Evergreen spines
Answer/Explanation
Markscheme
C
Question
Which term describes the whole of the genetic information of an organism?
A. Genome
B. DNA
C. Gene pool
D. Allele frequency
▶️Answer/Explanation
A
Question
A pregnant woman had fetal cells removed by chorionic villus sampling and tested. The following karyogram was produced.
What does this show?
A. The child is female with Down syndrome.
B. The child is female without Down syndrome.
C. The child is male with Down syndrome.
D. The child is male without Down syndrome.
▶️Answer/Explanation
D
Question
The image shows a human karyogram.
From which person was the karyogram obtained?
A. A female with Down syndrome
B. A female without Down syndrome
C. A male with Down syndrome
D. A male without Down syndrome
▶️Answer/Explanation
B
Question
Where can the entire genome of an organism be found?
A. In the DNA present in plasmids of a bacterial cell
B. In the DNA present in the nucleus of a eukaryotic cell
C. In the DNA present in the nucleus and chloroplasts of a plant cell
D. In the DNA present in the nucleus and mitochondria of an animal cell
▶️Answer/Explanation
Question
What is a feature of the human genome?
A. Plasmids
B. Messenger RNA
C. Transfer RNA
D. Mitochondrial DNA
▶️Answer/Explanation
D