Biology MCQ Quiz Hub

1. Visceral fat is stored chiefly ____
within subcutaneous adipocytes
around the thighs and neck
around the abdominal organs
within the liver and spleen

2. Select the correct statement about photosynthesis by primary producers.
Photosynthetic protists and prokaryotes Carry out the majority of the photosynthesis in aquatic communities.
Land plants carry out over 80% of the world's photosynthesis.
Cyanobacteria carry out more of the world's photosynthesis than protist do.
All of the above

3. Every ecosystem must have
Autotrophs
Heterotrophs
Both A & B
photosynthesizers

4. Which parts of the heart receive blood from the lungs?
Right ventricle
Left Atrium
Left Ventricle
Right Atrium

5. Plants grow in size because of
addition of cells
increase in size of cells
enlargement of cells
elongation of cells

6. Which of the following is true of enzymes?
Enzymes lowers the activation energy for the chemical reaction
Enzymes speed up the rate of a chemical reaction
Both A & B
Neither A nor B

7. Oxygen in our blood is transported by a protein named
keratin
myoglobi
collagen
haemoglobin

8. Where does protein synthesis take place in a cell?
Ribosomes
Mitochondria
Cytoplasm
Nucleus

9. Which statement describes decomposers?
Decomposers are insignificant organisms in the ecosystem and can be absent in some ecosystems
Decomposers can produce their own source of energy and can sometimes act as primary producers.
Decomposers are those organisms that recycle matter in the ecosystem..
All the above

10. Limbs of frog, lizard, bird and human are example of ______ organs.
Homogenous
Heterogeneous
Analogous
Homologous

11. The functional unit of the nervous system is the
Nephrons
Axons
Neurons
All of the above

12. Biological control is to check growth of
plants
animals
weeds
one pest by another

13. An irregular mode of reproduction resulting in the development of an embryo without fertilization is called 1.Parthenogenesis 2.Apogamy 3.Sporophytic budding Select the correct answer using the code given below.
1 only
2 only
2 and 3 only
1, 2 and 3

14. Bone strength in later life depends on
the formation of dense bones during youth
the increased calcium absorption in the elderly
the increased production of estrogen after menopause
reducing physical activity to protect bones

15. Select the correct statement about lymphocytes.
Lymph transport is faster than that occurring in veins
Lymph transport depends on the movement of adjacent tissues, such as skeletal muscles
Lymph transport is only necessary when illness causes tissue swelling
Under normal conditions, lymph vessels are very high-pressure conduits

16. Spongy, porous bone tissue is also called
Compact bone
Bone fissure
Yellow bone marrow
Cancellous bone

17. In Paramecium, the food is moved to a specific spot by the movement of ______ which cover the entire surface of the cell.
cilia
villi
pseudopodia
vacuole

18. What does the central nervous system consists of?
Brain
Spinal cord
Nerves
All the above

19. What three statements make up the cell theory?
All living things are made up of cells.
New cells come frome exisiting cells.
Cells are the basic unit of structure/function in living things.
All of the above

20. The predominant stage of the life cycle of a moss is the gametophyte which consists of two stages. The first stage is the ___________ stage.
Agar
Leafy
Chlorella
protonema

21. Artocarpus integra is the scientific name of ___________.
Guava
Pineapple
Silver Oak
Jack fruit

22. Metastasis is the process by which _________
Cell divide rapidly under the influence of drugs
Cancer cell spread through the blood or lymphatic system to other site or organs
The Chromosome in cell nuclei are attached to the soindle before moving to the anaphase poles
Cancer cells are successfully inhibited to divide any further

23. The term aerotolerant anaerobe refers to an organism that
uses oxygen or grows without oxygen.
requires more oxygen than is present in air.
does not use oxygen but tolerates it.
requires less oxygen than is present in air.

24. Movement of cell against concentration gradient is called
active transport
diffusion
osmosis
passive transport

25. What carries Blood back to the Heart?
Veins
Arteries
Both A & B
None

26. In a nucleosome, the DNA is wrapped around
histone octamer
helix
double helix
None of the above

27. Which virus is not associated with cancer?
Epstein-Barr virus
Papillomavirus
Retrovirus
Hepatitis virus

28. Which of these phosphorylates ADP to make ATP?
E
B
C
A

29. Which of these best describes genetic drift?
Random fluctuations in the gene frequencies within a population Eliminate
The combining of alleles to create more genetic variations within a population
The movement of alleles between population
A planned method to reduce the number of inferior genes in a population

30. Which one of the following functions is not carried out by smooth endoplasmic reticulum?
Transport of materials
Synthesis of lipid
Synthesis of protein
Synthesis of steroid hormone

31. In ovaries, the final products of meiosis are
haploid gametes
diploid gametes
Both A & B
None of the above

32. Select the correct statement about the ureters.
The ureter is innervated by parasympathetic nerve endings only.
Ureters contain sphincters at the entrance to the bladder to prevent the backflow of urine.
The epithelium is stratified squamous like the skin, which allows a great deal of stretch.
The ureters are capable of peristalsis like that of the gastrointestinal tract.

33. What process accounts for species diversity?
Predation
Mitosis
Symbiosis
Meiosis

34. In which Organelle does Cellular Respiration Occur?
Chloroplast
ATP and NADPH
Mitochondria

35. Which of the following are involved directly in pulmonary circulation?
left ventricle, aorta, and inferior vena cava
right atrium, aorta, and left ventricle
superior vena cava, right atrium, and left ventricle
right ventricle, pulmonary artery, and left atrium

36. Select the correct statement contrasting gametophytes and sporophytes.
Sporophytes are diploid, whereas gametophytes are haploid.
Sporophytes are vascular, whereas gametophytes are nonvascular.
Sporophytes are larger than gametophytes
All of the above

37. What base is found in RNA but not in DNA?
Uracil
Cytosine
Adenine
Guanine

38. Which best describes somatic mutations?
transmitted to progeny
not transmitted to progeny
Can't be identified
None of the above

39. Deep fried foods are carcinogenic because they are rich in
Nicotine
Hydrocarbons
Fats
All of the above

40. The sex of an offspring is determined by which of the following?
DNA of the female gamete
DNA of the male gamete
Neither the DNA of the male nor the female gamete
DNA of the male and the female gamete

41. The first formed primary xylem elements are called ___________.
Metaxylem
Protoxylem
Xylem fibres
Xylem parenchyma

42. The limbic system structure that regulates hunger is called the
Hypothalamus
Cerebellum
Pituitary gland
vacuole

43. Which of the following is a feature of leptin?
It acts primarily on the brain
It is secreted by the brain and acts on fat cells
It is an enzyme
It is usually deficient in thin people

44. Plants grow in size because of
addition of cells
increase in size of cells
enlargement of cells
elongation of cells

45. Which of the following is not a hormone found in animals?
Insulin
Auxins
Thyroxin
Adrenaline

46. The kidneys are stimulated to produce renin
when the pH of the urine decreases
when the specific gravity of urine rises above 1.10
when the peritubular capillaries are dilated
by a decrease in the blood pressure

47. In which of the following, the cellular power plants - Mitochondria are absent?
Bacteria
Red Algae
Brown Algae
Green Algae

48. What do genes code for?
Ptoteins
DNA
RNA
None

49. Goosebumps are caused by contractions of the
Muscles
Nerves
Bones
All of the above

50. Which one of the following statements about lymph is correct?
Lymph is formed due to leakage of blood through capillaries.
Lymph contains blood cells such as RBC.
Lymph is also circulated by the blood circulating heart.
Lymph only transports hormones.