Podcast
Questions and Answers
The diagram shows the elements present in two organic molecules, W and X. Which molecules could W and X be?
The diagram shows the elements present in two organic molecules, W and X. Which molecules could W and X be?
- Molecule W: monosaccharide; Molecule X: amino acid
- Molecule W: nucleic acid; Molecule X: trigylceride
- Molecule W: phospholipid; Molecule X: protein (correct)
- Molecule W: triglyceride; Molecule X: fatty acid
What is a consequence of the ability of water to form many intermolecular hydrogen bonds?
What is a consequence of the ability of water to form many intermolecular hydrogen bonds?
- Ice has a higher density than water and floats, providing habitats for fish-eating mammals.
- Light can pass through water, so algae can photosynthesise.
- Some small invertebrates can walk on water surfaces. (correct)
- Small amounts of energy are needed to change water from one state to another, so that evaporation rates and condensation rates are rapid.
Which molecules are produced during the hydrolysis of a triglyceride molecule?
Which molecules are produced during the hydrolysis of a triglyceride molecule?
- Water and glycerol
- Fatty acids and glycerol (correct)
- Water and fatty acids
- Water and lipids
The diagrams show the structure of leucine, an essential amino acid. Which diagram highlights the part of leucine that distinguishes it from other amino acids?
The diagrams show the structure of leucine, an essential amino acid. Which diagram highlights the part of leucine that distinguishes it from other amino acids?
What is a common feature of enzymes?
What is a common feature of enzymes?
What distinguishes aerobic respiration from anaerobic respiration in humans?
What distinguishes aerobic respiration from anaerobic respiration in humans?
What is a reason that Taq polymerase is a suitable enzyme for use in the polymerase chain reaction (PCR)?
What is a reason that Taq polymerase is a suitable enzyme for use in the polymerase chain reaction (PCR)?
A strand of DNA containing four codons with base sequence ACT GTA CTC TAC mutates, changing the base sequence to ACT ATG CTC TAC. What type of mutation has occurred?
A strand of DNA containing four codons with base sequence ACT GTA CTC TAC mutates, changing the base sequence to ACT ATG CTC TAC. What type of mutation has occurred?
The series of images shows two unicellular organisms found in ponds and lakes.
Which functions of life are being shown in these images by organism X?
The series of images shows two unicellular organisms found in ponds and lakes.
Which functions of life are being shown in these images by organism X?
Which is a feature of phloem sieve tube cells?
Which is a feature of phloem sieve tube cells?
What can be identified in the electron micrograph?
What can be identified in the electron micrograph?
Flashcards
Molecules W and X
Molecules W and X
Phospholipid and protein.
Water's Intermolecular H-bonds
Water's Intermolecular H-bonds
Some small invertebrates can walk on water surfaces due to high surface tension.
Triglyceride Hydrolysis
Triglyceride Hydrolysis
Fatty acids and glycerol are produced.
Leucine's distinguishing part
Leucine's distinguishing part
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Enzyme Feature
Enzyme Feature
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Aerobic vs. Anaerobic Respiration
Aerobic vs. Anaerobic Respiration
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Taq Polymerase
Taq Polymerase
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ACT GTA CTC TAC mutates to ACT ATG CTC TAC
ACT GTA CTC TAC mutates to ACT ATG CTC TAC
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Functions of life shown by organism X
Functions of life shown by organism X
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Phloem Sieve Tube Cells
Phloem Sieve Tube Cells
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Electron Micrograph
Electron Micrograph
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