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WorksheetsBiology
Total questions: 23
Worksheet time: 43mins
22 pairs of autosomes + XXY was found in a new born. Name the disorder
Down's syndrome
klinefeltor's syndrome
Turner's syndrome
Haemophilia
What is the role of a ribosome?
Link amino acids together
Bind messenger RNA
Synthesize polypeptides and proteins
Make other ribosomes
Scientists estimate that there are more than 20,000 species of ants. The species range in size from 1 mm long to 38 mm long and live in most environments. The diets of ants range from flowers and seeds to fluids from their own larvae. Ants have been able to successfully inhabit so many different environments because their populations have been able to --
hybridize with other species of insects
adapt to a variety of habitats and food sources
fill niches usually occupied by mammals
occupy habitats that have no other life-forms
The picture shows bean-shaped glands called nodes. The clusters of cells in the nodes include macrophages that break down viruses and other potentially harmful materials. Nodes also contain cells that produce protein particles capable of capturing harmful materials that flow in tissue fluid through the nodes. Different parts of the body are drained by nodes in different regions of the body.
Which body systems are directly responsible for regulating these nodes and protecting the body from harmful materials in tissue fluid?
Immune and lymphatic systems
Digestive and nervous systems
Endocrine and digestive systems
Circulatory and nervous systems
Part of an important cellular process involving a DNA strand is modeled in the image. (View image)
What is the purpose of this cellular process?
Preserving genetic information for future generations
Deleting the information in the sequence produced from the DNA template
Transcribing information in the DNA sequence for use by the cell
Producing more nucleotides for the DNA sequence
Nitrogenous bases are located on both strands of the DNA double helix. What is the significance of the nitrogenous bases?
The number of adenines and cytosines determines the type of RNA that will be produced.
The order of nitrogenous bases determines the order of amino acids in the proteins synthesized.
The amount of thymine and guanine in the DNA molecules determines the length of the genes.
The type of hydrogen bonding between the nitrogenous bases determines which amino acid will be added to the peptide chain.
Viruses can be transmitted through air, water, food, insect bites, and direct skin contact. Once a virus gains entry to the body, it invades a host cell in order to --
deactivate the host cell's defences
synthesize antibodies for defence
metabolize host proteins and grow
access cellular processes for replication
Albinism is an autosomal recessive condition. Which circle graph shows the genotype probability when an albino female mates with a male that is heterozygous for the albinism trait? (View Image)
F
G
H
J
The diagram shows cells in different phases of mitosis. A student is trying to find a cell in a particular phase of mitosis. The student is looking for evidence that spindle fibers are separating the chromosomes to ensure that each new nucleus has one copy of each chromosome. (View Image)
Which cell is in the phase of mitosis that the student is searching for?
Cell 1
Cell 2
Cell 3
Cell 4
The complex carbohydrates pictured (View Image) are made by linking molecules of glucose.
In all three complex carbohydrates, the subunits of glucose are bonded together differently. Because they have different structures, they most likely --
contain different chemical elements
form different proteins
carry different nucleotides
perform different functions
Where in the cell does DNA replication occur?
always the cytoplasm
always the nucleus
in the cytoplasm in eukaryotes and the nucleus in prokaryotes
in the cytoplasm in prokaryotes and the nucleus in eukaryotes
What does DNA polymerase do?
connects sugars and phosphates with weak hydrogen bonds
connects sugars and phosphates with strong covalent bonds
connects bases with strong hydrogen bonds
connects bases with strong covalent bonds
Where does transcription take place in a cell?
always in the nucleus
always in the cytoplasm
in the nucleus in eukaryotes and the cytoplasm in prokaryotes
in the cytoplasm in eukaryotes and the nucleus in prokaryotes
Which of the following describes the product of transcription?
contains ribose and U''s
contains deoxyribose and T's
contains ribose and T's
contains deoxyribose and U's
