Topic 7
Topic 8
Topic 9
Topic 10
Topic 11
100
What is the main role of the ribosomes labelled in the micrograph?
Synthesise proteins for use in lysosomes
100
In which process is pyruvate converted to acetyl CoA?
A. Glycolysis
B. Link reaction
C. Krebs cycle
D. Oxidative phosphorylation
B. Link reaction
100
Which of the following is/are a feature of phloem?
I.Sieve platesII.PlasmodesmataIII.High lignin content
A. I only
B. I and II only
C. I and III only
D. I, II and III
B. I and II only
100
The diagram below shows chromosomes during meiosis.
Identify the stage of meiosis from the diagram.
prophase I
100
Which part of the synovial joint envelops the synovial fluid?
A.
200
Which of the following is a similarity between transcription and translation?
A. Both use DNA as a template
B. Both occur in the 5' to 3' direction
C. Both involve binding to a ribosome
D. Both involve mRNA splicing
B. Both occur in the 5' to 3' direction
200
Which of the following stages of cellular respiration takes place in the cytoplasm?
A.
B. 
C. 
D. 
D.
200
Which process does not happen in the shoot apex?
A. Meiosis
B. Mitosis
C. Cell elongation
D. Primary growth
A. Meiosis
200
Which of the following is the strongest evidence supporting the hypothesis that two populations are two different species?
A. Allele frequencies differ between the two populations.
B. The two populations are reproductively isolated.
C. The DNA sequence of some genes was found to be different.
D. The two populations are geographically isolated.
B. The two populations are reproductively isolated.
200
Which of these substances should not pass through the glomerulus and into Bowman’s capsule?
A. Amino acids
B. White blood cells
C. Water
D. Glucose
B. White blood cells
300
The image shows a protein. Which level of protein structure is indicated by the letter P?
Tertiary
300
A mitochondrion is shown in the diagram. Which letter indicates the site where protons accumulate prior to the formation of ATP?
A.
300
In which location does fertilisation take place?
B.
300
What sequence of events usually occur during the process of speciation?
A. Reproductive isolation → one species becomes two species → random mutations
B. Random mutations → reproductive isolation → one species becomes another species
C. Geographic isolation → reproductive isolation → one species becomes another species
D. Geographic isolation → reproductive isolation → one species becomes two species
D. Geographic isolation → reproductive isolation → one species becomes two species
300
The diagram below represents a sarcomere. Which structures are labeled I and II ?
[© Revision Village 2022. Created with BioRender.com]
I II
A Tropomyosin Actin
B Myosin Tropinin
C Actin Myosin
D Myosin Actin
D.
400
Hershey and Chase conducted an experiment to investigate whether DNA or protein serves as the genetic material. They cultured 2 batches of viruses, one in a medium containing radioactive 35S and one in radioactive 32P. They then introduced each batch of viruses to separate cultures of bacteria. After allowing time for the viruses to infect the bacteria, the culture solutions were centrifuged to separate the viral remains from the bacterial cells, forming two layers, the pellet and the supernatant.
Which component of the tube would provide evidence that DNA is the genetic material?
A. Supernatant with radioactive 35S
B. Pellet with radioactive 35S
C. Supernatant with radioactive 32P
D. Pellet with radioactive 32P
D. Pellet with radioactive 32P
400
The diagram shows the pathway that converts threonine to isoleucine.
What is the name and mechanism of the process through which isoleucine interacts with threonine dehydratase?
End-product inhibition - Isoleucine binds to an allosteric site on the enzyme
400
Which structures does sucrose pass through during phloem loading?
I.PlasmodesmataII.Proton pumpsIII.Co-transporter proteins
A. III only
B. I and III only
C. II and III only
D. I, II and III
B. I and III only
400
In the Indian ocean, sand coloured oysters blend into rocks in the sand bar and dark coloured oysters blend better into the deepest parts of the ocean. What type of selection is this an example of?
A. Directional selection
B. Stabilising selection
C. Disruptive selection
D. Artificial selection
C. Disruptive selection
400
The graph shows the typical immune response to two doses of a vaccine.
State which type of molecule stimulates antibody production.
→ antigens
500
The diagram below represents the process of translation.
Identify structures Q and R on the diagram.
Q is the polypeptide chain OR chain of amino acids
→ R is a ribosome
500
What were the results obtained from the lollipop experiment that enabled Calvin to determine the order of the light-independent reactions of photosynthesis?
A. Algae Chlorella were killed after being added to hot methanol.
B. A high percentage of radioactivity was found in glycerate-3-phosphate in the first sample.
C. A large amount of triose phosphate and other sugar phosphates were found in the first sample.
D. 12CO22 was replaced by 14CO22, a radioactive isotope of carbon which was supplied to the algae Chlorella.
B. A high percentage of radioactivity was found in glycerate-3-phosphate in the first sample.
500
Outline the role of gene expression in stem growth.
Any three of the following:
→ gene expression is affected by auxin[1]
→ changes in gene expression stimulate cell division[1]
→ cell division leads to stem growth[1]
→ changes in gene expression stimulate differentiation in the stem
500
Which is most likely a correct description of a given speciation event?
[©Revision Village 2023.]
A. Bonobos and chimpanzees evolved from a common ancestor.
B. A hybrid species was produced by two smartweed species (genus Persicaria).
C. Reproductive isolation occurs between two species due to geographic isolation.
D. Bonobos and chimpanzees evolved from a common ancestor.
B. A hybrid species was produced by two smartweed species (genus Persicaria).
500
Where do the Malpighian tubules in insects bring wastes to?
A. Midgut
B. Hindgut
C. Outside surface
D. Kidney
B. Hindgut