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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A Biology questions and answers best for biology students and those who are interested in learning biology. You got three (3) minutes to attempt all the 15 questions. You can check your score and the correct answers from the button below. Please post your score in the comment box below.

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You might want to check Biology question set 007 Biology question set 005 1. It is known that a lactating mother may suffer from the weakning of teeth and bone. Which vitamin and minerals would she need to correct this condition ?
vitamin K, iodine and phosphorus
vitamin C, phosphorus and calcium
vitamin A, calcium and iron
vitamin D, phosphorus and calcium

2. The organism in a food chain that releases materials for re-use by green plants is called
decomposer
secondary consumer
primary consumer
primary producer

3. Green plants produce less carbon dioxide during the day because
the rate of respiration is low during the day
some of the carbon dioxide produced is used up internally for photosynthesis
transpiration interfere with carbon dioxide evolution by leaves
most stomata close due to strong heat during the day

4. Which one of the following is the correct order of arrangement from the smallest to the largest group of organisms?
species, orde, genus, class, phylum
species, class, order genus, phylum
species, class, order, phylum, genus
species, genus, order, class, phylum

5. Which of the following methods would best determine the rate of growth of a seedling?
length of radicle and fresh weight
diameter of radicle and dry weight
length of radicle and dry weight
diameter of radicle and fresh weight

6. What would happen if a ligament broke?
muscles would be detached from bone
muscle pull would result
there would be dislocation of bones during movement
synovial fluid would leak out from a synovial membrane

7. Which of these characters is an example of continous variation in man?
skin colour
albinism
dwafism
blood group

8. The element that is essential for the formation of both plant cell wall and bone in animals is
iron
calcium
phosphorus
sulphur

9. In favorable conditions, yeast reproduce by
fragmentation
conjugation
sporulation
budding

10. Which one of the following protozoa has cilia?
amoeba
euglena
paramecium
plasmodium

11. The kidneys purify blood by
ultra filtration
absorption and filtration
selective absorption and filtration
ultra filtration and selective re-absorption

12. Which vessel empties fat into the right atrium of the mammalian heart?
posterior vena cava
anterior vena cava
palmonary vein
palmonary artery

13. Which one of these insects does not lay eggs in its life cycle?
bee
grasshopper
tsetse fly
house fly

14. Which one of these is not a mean of movement in protozoa?
coeclom
flagella
cilia
pseudopodia

15. The type of soil with minute airspaces and high water retention capacity is
sand
clay
silt
loam

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You will love this biology test format, do quiz, check your answers instantly. set 007

Biology questions
The questions are changed every two days, please visit regularly for new questions. Enjoy your biology study !!!

1. An athlete has just finished a race. The phrase "oxygen debt " refers to

the amount of oxygen originally present in the muscles of the athlete before the race
the amount of oxygen taken in after the race and used to complete the combustion of some of the lactic acid
the total amount oxygen taken in during panting after the race
the amount of oxygen needed by the lungs after the race for combustion of glucose

2. Which one of the following is not an important function of the liver?

detoxification of poison
regulation of cholesterol production
storage of amino acid
storage of vitamin and mineral salts

3. Which one of the following is not an adaptation to facilitate gaseous exchange in organisms?

increased surface area of organs involved
decrease in thickness of exchange surface
increased body size of organism
increase in concentration gradient

4. Which one of the following does not cause increase in human body temperature?

constriction of peripheral blood vessels
shivering of muscles
increased metabolic rate
dilation of deep lying blood vessels

5. In the process of blood clotting, thrombin acts as an enzyme to bring about conversion of

fibrinogen to fibrin
fibrin to fibrinogen
prothrombin to thrombokinase
thrombokinase to prothrombin

6. The saprophytic and holoizoic modes of feeding are similar because both

do not feed on cellulose
do not require chloroplast
utilize enzymes to break down complex food substances
feed only on dead organic matter

7. Which one of the following causes variation which is always inherited?

mutation
radiation
geographical position
environmental factor

8. The following belong to the same group of organisms except

trypanosoma
penicillium
plasmodium
entamoeba histolytica

9. If a specie has 24 chromosomes in each somatic cell, how many chromosomes will a sperm cell contain?

6
12
24
48

10. The cichlidae fish family (small fish ) occupy various areas in lake Victoria, lake Edwards and lake George. They feed on weeds and insects. Some lay eggs at lake bottoms, others on sand shores and rocky banks. This is a good example of

adaptive radiation in the species
colonization of land
succession in the lake
fish behavior

11. Which of the following presents the diameter of a silt particles?

2 - 0.2
0.2 - 0.02
0.02 - 0.002
less than 0.002

12. In peas, the gene for tallness (T) is dominant over that of shortness (t). If peas of different genotypes were crossed and all offsprings appeared tall, what would be the genotype of the parental peas?

Tt × Tt
tt × tt
TT × tt
TT × TT

13. Which of the following is true of an atlas vertebra?

it has a prominent neural spine
has a short neural spine
the neutral canal is very large
the centrum is modified into odontoid process

14. The femur is connected to the pelvic girdle of a human by

cartilage
synovial fluid
ligaments
ball and socket joint

15. Which fins in fish are used for creating the current of water to facilitate breathing while the fish is stationary ?

dorsal fins
pectoral fins
pelvic fins
caudal fins

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Do you like checking your answers instantly? here biology set 006

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Question 1.
Which one of the following groups of animals possesses an open circulatory system ?

amphibians
Insects
Mammals
Fish

Biology: Have you been told anything about virus ? find out

Biology note
A detailed insight on virus 

A virus is a biological agent that reproduces inside the cells of living hosts. When infected by a virus, a host cell is forced to produce thousands of identical copies of the original virus an extraordinary rate.

 There are various types of viruses in the world, As a representative of viruses, T2 Phage is itroduced here with its importance. 

Test your self with these biology questions 

biology question set 005

biology question set 004

what makes biology very easy ?test your knowledge with these question set 005

             Biology question set 005

See biology question set 004

      Biology question set 003

Instructions:

• The set consist of section A and B.
• You can post the answers in comment box below. 

Questions 

SECTION A

1. From which of the following region of the body would you find  vertebrae with less developed centra?

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