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Questions and Answers
Which characteristic of living organisms is represented by gas exchange in the alveoli?
Which characteristic of living organisms is represented by gas exchange in the alveoli?
- excretion (correct)
- nutrition
- growth
- reproduction
The diagram shows how Homo sapiens (modern people) could have evolved from earlier ancestors. Which statement about modern people and their ancestors is correct?
The diagram shows how Homo sapiens (modern people) could have evolved from earlier ancestors. Which statement about modern people and their ancestors is correct?
- They are the same species and the same genus.
- They are the same species but not the same genus.
- They are the same genus but not the same species. (correct)
- They are neither the same species nor the same genus.
What is a characteristic of both insects and arachnids?
What is a characteristic of both insects and arachnids?
- exoskeleton (correct)
- wings
- only three pairs of legs
- eight legs
An animal can swim, has a backbone, and produces milk. Which group does this animal belong to?
An animal can swim, has a backbone, and produces milk. Which group does this animal belong to?
In which cell structure does aerobic respiration occur?
In which cell structure does aerobic respiration occur?
Which formula shows the correct way to calculate the actual size of an object?
Which formula shows the correct way to calculate the actual size of an object?
What is a reason why oxygen diffuses into the blood from an alveolus in the lungs?
What is a reason why oxygen diffuses into the blood from an alveolus in the lungs?
The diagram shows two plant cells. Which statement describes what will happen to the water in the cells?
The diagram shows two plant cells. Which statement describes what will happen to the water in the cells?
Which row describes active transport?
Which row describes active transport?
Which row shows the elements that make up a carbohydrate molecule?
Which row shows the elements that make up a carbohydrate molecule?
Large molecules are made from smaller molecules. Which row names the large molecule and the small molecules it is made from?
Large molecules are made from smaller molecules. Which row names the large molecule and the small molecules it is made from?
The graph shows the effect of temperature on the activity of an enzyme. Which statements about the enzyme and substrate at temperatures 1 and 2 are correct?
The graph shows the effect of temperature on the activity of an enzyme. Which statements about the enzyme and substrate at temperatures 1 and 2 are correct?
In an investigation, the rate of photosynthesis in a plant is measured at different temperatures. The investigation is carried out at three different light intensities. The results are shown. What is the limiting factor for the rate of photosynthesis at point X?
In an investigation, the rate of photosynthesis in a plant is measured at different temperatures. The investigation is carried out at three different light intensities. The results are shown. What is the limiting factor for the rate of photosynthesis at point X?
In plants, which ions are used to make amino acids?
In plants, which ions are used to make amino acids?
The diagram shows a cross-section of part of a leaf. Which structure is the cuticle?
The diagram shows a cross-section of part of a leaf. Which structure is the cuticle?
Poor nutrition can lead to a condition called rickets in which bones fail to develop properly. The table shows some minerals and vitamins present in four foods. Which food would be best for a child who has rickets?
Poor nutrition can lead to a condition called rickets in which bones fail to develop properly. The table shows some minerals and vitamins present in four foods. Which food would be best for a child who has rickets?
Which food group is chemically digested in the mouth, passes through the stomach and continues to be broken down by chemical digestion in the small intestine?
Which food group is chemically digested in the mouth, passes through the stomach and continues to be broken down by chemical digestion in the small intestine?
Which row about bile is correct?
Which row about bile is correct?
The small intestine is where most digested foods are absorbed. The small intestine has many villi. These are some features of villi. 1 Each villus contains a network of capillaries. 2 Each villus contains a lacteal. 3 The surface of each epithelial cell is covered with microvilli. 4 Villi increase the internal surface area of the small intestine. Which statements about the villi are important for the efficient absorption of glucose?
The small intestine is where most digested foods are absorbed. The small intestine has many villi. These are some features of villi. 1 Each villus contains a network of capillaries. 2 Each villus contains a lacteal. 3 The surface of each epithelial cell is covered with microvilli. 4 Villi increase the internal surface area of the small intestine. Which statements about the villi are important for the efficient absorption of glucose?
Which statements about xylem vessels are correct? 1 Xylem vessels have cells with cross walls. 2 Xylem vessels have thick walls with lignin. 3 Xylem vessels transport water and mineral ions.
Which statements about xylem vessels are correct? 1 Xylem vessels have cells with cross walls. 2 Xylem vessels have thick walls with lignin. 3 Xylem vessels transport water and mineral ions.
Dodder is a plant that grows on other plants called hosts. The dodder plant connects to the host's vascular bundles. The dodder plant does not have green leaves or roots. What correctly describes the regions for translocation?
Dodder is a plant that grows on other plants called hosts. The dodder plant connects to the host's vascular bundles. The dodder plant does not have green leaves or roots. What correctly describes the regions for translocation?
The diagram shows part of the human circulatory system. Which structure is the hepatic vein?
The diagram shows part of the human circulatory system. Which structure is the hepatic vein?
What is a feature of passive immunity?
What is a feature of passive immunity?
The graph shows the change in the rate of breathing of an athlete. What causes the response during time period Y?
The graph shows the change in the rate of breathing of an athlete. What causes the response during time period Y?
These are processes that occur in plants. 1 active transport 2 cell division 3 osmosis 4 transpiration. Which processes use energy from respiration?
These are processes that occur in plants. 1 active transport 2 cell division 3 osmosis 4 transpiration. Which processes use energy from respiration?
What is the balanced equation for anaerobic respiration in yeast?
What is the balanced equation for anaerobic respiration in yeast?
Which labeled organ has a major role in the assimilation of amino acids by converting them to proteins?
Which labeled organ has a major role in the assimilation of amino acids by converting them to proteins?
A toxin that is the same shape as a neurotransmitter prevents muscle contraction. Which statement explains why the toxin prevents muscle contraction?
A toxin that is the same shape as a neurotransmitter prevents muscle contraction. Which statement explains why the toxin prevents muscle contraction?
The diagram shows the structure of the human eye. Which labelled part refracts light entering the eye?
The diagram shows the structure of the human eye. Which labelled part refracts light entering the eye?
A patient is injected with adrenaline. Which graph shows the expected changes to pulse rate and blood glucose concentration?
A patient is injected with adrenaline. Which graph shows the expected changes to pulse rate and blood glucose concentration?
The diagram shows the shoot and root of a seedling, responding to gravity. Which row shows where the auxin accumulates and the effect of this in the shoot?
The diagram shows the shoot and root of a seedling, responding to gravity. Which row shows where the auxin accumulates and the effect of this in the shoot?
Which factors would increase the chance of antibiotic resistance developing? 1 regularly giving antibiotics to healthy livestock 2 only using antibiotics to treat bacterial infections 3 using several different antibiotics to treat an infection 4 using good personal hygiene to avoid infection
Which factors would increase the chance of antibiotic resistance developing? 1 regularly giving antibiotics to healthy livestock 2 only using antibiotics to treat bacterial infections 3 using several different antibiotics to treat an infection 4 using good personal hygiene to avoid infection
What is an advantage of using asexual reproduction in crop plants?
What is an advantage of using asexual reproduction in crop plants?
The graphs show the concentrations in the blood of four hormones involved in controlling the menstrual cycle. Which line represents FSH (follicle-stimulating hormone)?
The graphs show the concentrations in the blood of four hormones involved in controlling the menstrual cycle. Which line represents FSH (follicle-stimulating hormone)?
The mitotic index of a tissue is the percentage of cells in the tissue that are dividing by mitosis. The table shows information about two tissue samples, X and Y. Which statement is correct?
The mitotic index of a tissue is the percentage of cells in the tissue that are dividing by mitosis. The table shows information about two tissue samples, X and Y. Which statement is correct?
Fruit flies can either have red eyes or white eyes. This is a sex-linked characteristic with the gene for eye colour located on the X chromosome. The allele for red eyes (R) is dominant over the allele for white eyes (r). A fruit fly with the genotype $X^RX^r$ was crossed with a fruit fly with the genotype $X^rY$. Which percentage of the offspring will have red eyes?
Fruit flies can either have red eyes or white eyes. This is a sex-linked characteristic with the gene for eye colour located on the X chromosome. The allele for red eyes (R) is dominant over the allele for white eyes (r). A fruit fly with the genotype $X^RX^r$ was crossed with a fruit fly with the genotype $X^rY$. Which percentage of the offspring will have red eyes?
Which statement about variation is correct?
Which statement about variation is correct?
When in vitro fertilisation (IVF) is used in captive breeding programmes, these processes occur. 1 The egg cell is fertilised. 2 The egg cell is removed from an ovary. 3 The embryo is implanted into the uterus. 4 The sperm cells are added. In which order do these processes occur?
When in vitro fertilisation (IVF) is used in captive breeding programmes, these processes occur. 1 The egg cell is fertilised. 2 The egg cell is removed from an ovary. 3 The embryo is implanted into the uterus. 4 The sperm cells are added. In which order do these processes occur?
Flashcards
Gas exchange in alveoli
Gas exchange in alveoli
Gas exchange occurs in the alveoli, which is a characteristic of living organisms.
Exoskeleton
Exoskeleton
Insects and arachnids both feature an external skeleton for protection and support.
Mammal characteristics
Mammal characteristics
A mammal is an animal that swims, has a backbone, and produces milk.
Aerobic Respiration Location
Aerobic Respiration Location
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Formula for Actual Size
Formula for Actual Size
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Oxygen Diffusion in Lungs
Oxygen Diffusion in Lungs
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Active Transport
Active Transport
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Elements in Carbohydrates
Elements in Carbohydrates
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Cellulose Components
Cellulose Components
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High Temperature and Enzymes
High Temperature and Enzymes
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Limiting Factor at Point X
Limiting Factor at Point X
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Ions for Amino Acids
Ions for Amino Acids
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Carbohydrate Digestion Location
Carbohydrate Digestion Location
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Bile action on fats
Bile action on fats
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Villi Features for Absorption
Villi Features for Absorption
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Xylem Vessel Features
Xylem Vessel Features
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Passive Immunity
Passive Immunity
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Cause of Athlete's Response
Cause of Athlete's Response
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Energy-Using Plant Processes
Energy-Using Plant Processes
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Anaerobic Respiration in Yeast
Anaerobic Respiration in Yeast
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Organ for Amino Acid Assimilation
Organ for Amino Acid Assimilation
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Toxin's Effect on Muscle Contraction
Toxin's Effect on Muscle Contraction
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Cornea Function
Cornea Function
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Asexual Reproduction Advantage
Asexual Reproduction Advantage
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Identify FSH in Menstrual Cycle
Identify FSH in Menstrual Cycle
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Study Notes
- Gas exchange in the alveoli represents a characteristic of living organisms.
- Homo sapiens (modern people) evolved from earlier ancestors like Homo heidelbergensis, Homo erectus, and Homo habilis.
- Modern people and their ancestors are the same genus but not the same species.
- Both insects and arachnids have an exoskeleton.
- An animal that can swim, has a backbone, and produces milk belongs to the mammals group.
- Aerobic respiration occurs in the mitochondrion of the cell.
- The method to calculate the actual size of an object is: actual size = image size / magnification.
- Oxygen diffuses into the blood from an alveolus because the oxygen concentration in the alveolus is greater than the oxygen concentration in the blood.
- In plant cells, water moves from a high water potential region to a low water potential region.
- Active transport involves the movement of substances from a lower to a higher concentration.
- Active transport needs energy from respiration.
- Active transport requires a protein carrier in the cell membrane.
- Carbohydrate molecules contain carbon, hydrogen, and oxygen.
- Large molecules are made from smaller molecules.
- Cellulose is made of glucose.
- Fat is made of glycerol and fatty acids.
- Glycogen is made of glucose.
- Starch is made of glucose.
- At temperature 1, the active site fits the substrate in the enzyme.
- At temperature 2, the substrate changes shape so that it cannot fit into the active site.
- At point X of the rate of photosynthesis, light intensity is the limiting factor.
- Plants use nitrates to make amino acids.
- The cuticle in a leaf is the waxy layer on the leaf.
- Minerals and vitamins needed for a child with rickets include Calcium and Vitamin D.
- Carbohydrates are chemically digested in the mouth, pass through the stomach, and continues to be broken down by chemical digestion in the small intestine.
- Bile is produced in the liver, increases the fat droplet surface area, and the process involved is physical digestion.
- Features of the villi that are important for the efficient absorption of glucose are: each villus contains a network of capillaries; the surface of each epithelial cell is covered with microvilli; villi increase the internal surface area of the small intestine.
- Xylem vessels have thick walls with lignin and transport water and mineral ions.
- In dodder plants, host leaves acts as a source and dodder acts as a sink for translocation.
- The hepatic vein is the blood vessel that carries blood away from the liver.
- A feature of passive immunity is that antibodies are acquired from another individual.
- The increase in the concentration of carbon dioxide in the blood causes the response in the athlete in time period Y.
- Active transport and transpiration are processes that use energy from respiration in plants.
- The balanced equation for anaerobic respiration in yeast is: C6H12O6 → 2C2H5OH + 2CO2.
- The liver has a major role in the assimilation of amino acids by converting them to proteins.
- A toxin that blocks the binding of neurotransmitters to receptors on motor neurones prevents muscle contraction.
- The cornea refracts light entering the eye.
- After injection with adrenaline, pulse rate increases and blood glucose concentration increases.
- Auxin inhibits cell elongation on the lower surface in the shoot of a seedling.
- Factors that increase the chance of antibiotic resistance developing are regularly giving antibiotics to healthy livestock and using several different antibiotics to treat an infection.
- An advantage of using asexual reproduction in crop plants it can reliably produce many crop plants with a desirable characteristic.
- Line A represents follicle-stimulating hormone (FSH) involved in controlling the menstrual cycle.
- Tissue X is growing fastest with a mitotic index of 31.3%.
- When there are red and white eyed fruit files and a sex linked gene for eye colour on the X chromosome, where the allele for red eyes (R) is dominant over the allele for white eyes (r). If a fruit fly with the genotype XRX was crossed with a fruit fly with the genotype XRY, 50% of the offspring will have red eyes.
- Seed shape in peas shows discontinuous variation.
- Nitrogen fixation is a part of the nitrogen cycle where nitrate ions change to nitrogen gas.
- In in vitro fertilisation (IVF), these processes occur in the order: the egg cell is removed from an ovary, then the sperm cells are added.
- Next, the egg cell is fertilised, and finally the embryo is implanted into the uterus.
- Plasmid is the cell structure in bacterial cells used in genetic modification.
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