New biology quiz style with good explanation of the answers, showing your knowledge

Bilolgy questions with wll explained answers

MULTIPLE CHOICE BIOLOGY QUESTIONS WITH ANSWERS

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1. Which one of the following statements correctly describes the transcription of DNA?
It produces amino acids
It results in an increased DNA synthesis
It produces messanger RNA
It occurs at the surface of the ribosome

2. Which one of tge following events occurs during telophase of mitosis in the meristematic cells of a root tip?
Cleavage of the cytoplasm
Replication of the centrioles
Replication of the chromosome
Formation of the cell plate

3. The following are mmetabolic processes
(i)synthesis of plasma protein
(ii)regulation of fat metabolism
(iii)storage of vitamin A
(iv)manufacture of digestive enzymes
Which of these are functions of the liver?
(i), (ii) and (iii)
(i), (ii) and (iv)
(i), (ii) and (iv)
(ii), (iii) and (iv)

4. What happens to most of the reduced NADH2 molecules in cell metabolism?
Direct use in the synthesis of starcfrom glucose
Oxidation in mitochondrial ATP formation
Oxidation in the Calvin Cycle
Combination with sulpheric acid as part of the Krebs cycle

5. Which base sequence below will pair with AGU ?
TGC
TCA
GCC
ATT

6. Which one of the following would cause phenotypic variation among organisms of the same genotype?
Exposure to different environments
Continouse variation within the species
Different sexes
Mutation

7. The phylogenetic approach to classification is used because it groups together all animals that show
Analogous structures
Homologous structures
Convergent evolution
Adaptive radiation

8. Which one of the following sequences correctly represents the action of notifying bacteria?
Ammonium -> nitrite -> nitrate
Ammonium -> nitrate ->nitrite
Nitrite -> ammonium -> nitrate
Nitrite ->. nitrate -> ammonium

9. Which one of the following would speed up the phosphorylation of hexose sugar?
A decrease in ADP concentration
A decrease in the concentration of APT
An increase in concentration of phosphorylase
An increase in the concentration of phosphorylated hexosees

10. Changes in the level of carbon dioxide mammalian blood is detected by
Carotid and aortic bodies
Medulla oblongata
Cardio-vascular center
Hypothalamus

11. Which one of the following may be a result of inbreeding ?
Improved fertility
Accumulation of lethal genes
Polyploidy
Increased mutation rate

11. Which one of the following is the main function of the Golgi apparatus in the living cell?
Destruction of worn out cells organelles
Synthesis of cell wall components
Synthesis of protein
Intracellular transport

13.Which of the following methods is most suitable for establishing the population of the paramecium in a pond ?
Capture-recapture method
Total count
Removal sampling
Random sampling

14. Which of the following pairs of proteins is found in skeletal muscle ?
Actin and myosin
Keratin and actin
Myosin and fibrogen
Myosin and collagen

15. The physiological important of the hair-pin counter multiplier system in mammalian kidney is to ensure that
Much water is excreted out through the kidney
Much water is reabsorbed
Glucose in not lost in urine
All urea is excreted in urine

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Were you brave enough to try question set 004? mark your self

ANSWERS TO QUESTIONS SET 004 

            SECTION A

1. C          2. D          3. B           4. B        

5. B         6. C           7. A           8. B 

9. C         10. D 

See
 question set 003
Answers to question set 003

            SECTION B 

11. Transpiration is the loss of water from the plants' leaves by evaporation. This  can also occur through stems and flowers
(b). Environmental factors that affect the rate of transpiration are:-

• Temperature of the surrounding air 
• Humidity of the surrounding air 
• Pressure of wind 
• Light intensity 

Experiment to show that a plant trqnspires 
A large transparent polythene bag is tied around the shoot of a potted plant, and the plant is transferred to light.
After a few hours, droplet are seen to form on the bag.
This droplets are collected and tested to see if they are water. Example put the droplets in anhydrous copper sulphate which is white. This will turn to blue, and this confirms these to be drop of water.
Therefore water is given out by a transpiring plant.

In the contol experiment, a similar plant set up as above is used, except the leaves and flowers are removed. Then the set up is left in sunlight for a few hours, there will be no droplets. This shows that there is no transpiration here

This questions will defeat you if you are not well prepared, set 004

 Biology question set 004

Instructions:

• This set comprises of two sections A and  B 
• Answer all the questions 
• Pick the correct option 

See

 question set 003

  question set 002

Section A

1.  Ecological systems often have producers, consumers, predators, and preys. Which organisms maintain the balance of ecosystems ?
A.  Preys             B. Consumers
C. Producers      D. Predators

2. A student heated strongly a dry sample of soil to a constant mass.  The loss of mass in the soil is due to
A. loss of mineral salts
B. Loss if water
C. Escape of air
D. Destruction of humus

3. Which one of the following forms part if the insect respiratory system ?
A. Trachea, tracheoles and branchioles
B. Spiracle, trachea and tracheoles
C. Spiracles, trachea and bronchioles

D. Trachea, bronchus and bronchioles
4. The normal reproductive cycle of the human female involves the interaction of the
A. Oviduct, thyroid gland and ovary
B. Pituitary gland, ovary and vagina
C. Adrenal gland, ovary and vagina
D. Placenta, pituitary gland and uterus

5. Which one of the following plants would depend most one wind for its reproduction?
A. Small inconspicuous flowers and light seeds
B. Sticky pollen grains and explosive fruits
C. Numerous pollen grains and enclosed stigma
D. Coloured petals and small hairt fruits

6. Spirogyra normally reproduce by
A. Binary fission
B. Conjugation
C. Budding
D. Hypae

7. In man eostrus cycle is also known as
A. Heat period
B. Gestation period
C. Menstrual cycle
D. Lactation cycle

8. A defect affecting the shape of blood cells which can be inherited is known as
A. Haemophilia
B. Diabetes
C. Anaemia
D. Sickle cell

9. In one-day old tadpoles, gaseous exchange is performed by
A. Lungs
B. External gills
C. Internal gills
D. Skin of the tail

10. which one of the following are the end product of the digestion of cane sugar ?
A. Glucose and fructose
B. Fructose and galactoes
C. Gycerol and fructose
D. Galactoes and glucose

SECTION B
11 (a). What is transpiration?
  (b). State the environmental factors that affects the rate of transpiration
 (c). Describe an experiment to show that plants transpire

12(a). State the method you would employ to determine the population of animals in a given habitat
(b). Give factors that may affect the destribution of animal population in any habitat 

If you did question set 003, here are the answers

BIOLOGY 

ANSWERS TO BIOLOGY QUESTION SET 003

1.C             2.A             3.B            4.D 5.C              6.B             7.B           8.C 9.C           .  10.D          11.B         12.A 13.A            14.C          15.C      16.N/A 17.B            18.D         19.A          20.A     

Check the following 

 Biology question set 003

Biology question set 002