What is the function of tendons and name its characteristics that facilitate its function. (ch17)
To transmit the pulling force produced by muscle contraction to the bone. It is tough and inelastic.
Name all process in our body that involves physical digestion after we eat (Ch6)
Chewing, peristalsis, churning (in stomach), emulsification (by bile)
What is the cause of sickle-cell anaemia? (ch26)
Substitution of a base in the gene that codes for a polypeptide chain in haemoglobin
What are the conditions necessary for seed germination? (ch14)
Water, warmth, oxygen. (PS. why not nutritions?)
What is the function of rough endoplasmic reticulum (ER)? (Ch2)
synthesis of protein
What happens to a plant cell when it is placed in a hypotonic solution? (ch3)
It becomes turgid (water enters the cell)
What will carbon dioxide becomes after it diffuse into red blood cells? (ch7)
it reacts with water to form hydrogencarbonate ions (and hydrogen ions)
How are lipid (after digestion: fatty acids and glycerol) being absorbed and transport around the body? (Ch6)
They diffuse into the epithelium of villi and recombine into fine lipid droplets before entering lymph in the lacteals
What is the function of coenzyme A? (Ch21)
It act as a carrier to carry the acetyl group (product from glycolysis) into the Krebs cycle
Which important component is often not shown in a food chain that illustrate the energy flow along trophic levels? (ch19)
Decomposer
In which process of photosynthesis is water produced as a by-product? (Ch20)
Photolysis of water
"Suspensory ligaments contract to pull the lens thinner." Comment on this statement. (ch15)
It should be " ciliary muscles relax to increase tension of the suspensory ligament. Hence the lens is pulled and becomes thinner,
Why is myelin sheath important to nerve fibres? (ch16)
It insulate the fibres to prevent transmission of nerve impulses to the surroundings and also speed up the transmission.
Which type of blood is tricuspid valve be in contact of? (ch8)
deoxygenated blood
What is the definition of homeostasis? (ch18)
To maintain a relatively constant internal environment in an organism.
How does the production of male and female gametes differ in human? (ch13)
Males start to produce sperms daily at puberty. whereas females' ova were already produce before birth and will only start to develop further at puberty
How do we describe the model for cell membrane? (Ch3)
Fluid mosaic
What is the name of the reaction that allows monosaccharides to join together? (ch5)
Condensation
What is the difference between transpiration and transpiration pull? (CH10)
Transpiration refers to the process of water evaporation from the plant surface. Pull refers to the FORCE created to pull water up the xylem vessels from roots
What is the name of the type of metabolism that refers to breaking-down reactions? (ch4)
Catabolism
What controls the opening and closing of stoma? (ch9)
Guard cells
What antibody is present in plasma for a person with blood group A? (Ch25)
anti-B
What is the difference between intraspecific and interspecific competition? (ch19)
Intraspecific: between the same species; Interspecific: between two different species
What happens during anaphase in mitotic cell division? (ch11)
spindle fibres contracts and sister chromatids are separated
What are the possible causes of short sight and how should we correct it? (ch15)
Causes: The lens too thick or eyeball too long. Correction: wear concave lens
What are the adverse consequences of the indiscriminate use of antibiotics? (ch23)
It speeds up the development of antibiotic resistance in large population of bacteria. (It also kill of beneficial bacteria in our body)
What is osmosis? (ch3)
The net movement of water molecules from a region of higher water potential to a lower water potential across a differentially permeable membrane.
Explain the action of glucagon. (ch18)
To convert stored glycogen into glucose hence increasing the blood glucose level.
What is the effect of auxins at shoot and root region respectively? (ch15)
Shoot: promote growth; Root: inhibit growth
Mary claims that no gas exchange happen at compensation point. What is compensation point? Do you agree with her? (ch9)
The rate of photosynthesis equals to the rate of respiration. No I don't agree, there are simply no NET exchange of gas.
Why is the presence of cartilage is important for our respiratory tract? (Ch7)
To provide support and prevent the tract from collapsing due to the frequent change in air pressure.
What structure in plants that majorly promote secondary growth? (ch14)
Vascular cambium
What causes the higher blood pressure in arteries and arterioles? (ch8)
the pumping action of heart (NOT 'heart')
What function does medulla oblongata responsible of? (ch16)
involuntary actions and reflex center
A mass of tumor cell are found to be enclosed in connective tissues. It is described to be...? (ch22)
Benign
How to calculate the magnification of a light microscope (Ch2)
magnification of eyepiece x magnification of objective
A set of chromosome before and after cell division is shown: ABCDEF --> ABEDCF. What type of mutation is shown? (CH26)
Inversion
If rate of transpiration is greater then its rate of water absorption, what does it mean? (ch10)
It means the plant has a net amount of water loss.
Name the deficiency disease for lacking vitamin C (ch5)
scurvy
Which process in respiration produce the most amount of energy (ATP)? (ch21)
Oxidative phosphorylation
Where does chlorophyll located in plants? (ch20)
on the thylakoid membrane inside chloroplasts.
What is the working principle of vaccination? (Ch24)
It stimulates primary response hence to develop an enhanced immunity in the body
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