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
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

Please post your score in the comment box below

Comments

Post a Comment

Popular posts from this blog

CONECTIVE TISSUE

Image
Structural, Characteristics, Functions and Location of Connective Tissue . Structural Characteristics: The. amount of matrix is more in connective tissue but the number of cells is comparatively less. Matrix may be jelly like, soft or hard and fragile. One or more than one type of fibre and materials like calcium carbonate may remain present in matrix (Fig-5.6): Functions : Connective tissue connects muscle with muscle and bone with bone. Connective tissue may transform into skeletal tissue, fibrous tissue and. fluid connective tissue. On the basis of structure and function connective tissue is mainly of three types. As: A . Films Connective Tissue: This type of connective tissue lies below the body-integument and sparsely in muscles. In their matrix numerous fibres are present. B. Skeletal Tissue: Internal structural building tissue of the body is called the skeletal tissue. Functions : 1. This tissue forms the internal structure of the body, e.g. skeletal system. 2. It gives the b...
Read more

Male-Female determining chromosome:

Image
Male-Female determining chromosome: @@@$ IMPORTANT@@@ READ THIS Every living being has a definite number of chromosomes. In human beings there are 23 pairs of chromosome. Among them 22. pairs are similar in both male and female, these are Autosomes, AA. Members of the remaining pair of chromosome are different in male and female. This pair of chromosome determines the sex of human beings. As they determine the sex, so they are called X and y sex chromosome or sex determining chromosome. One of the sex chromosomes is X chromosome and the other is Y chromosome. If the sex chromosome pair is XY, the child will be male (son), and if it is XX, the child will be female (daughter). In Drosophylla (a fly) also XX indicate female and XY male. So in case of determining the sex, the role of X and Y chromosome is vital. Whether the child will be a son or daughter: Now we will discuss whether the father or mother is responsible for the birth of a son or daughter. Both male and female have 44 autos...
Read more

Division Of Labour In Multicellular Plants

Image
Division Of Labour In Multicellular Plants : Tissue and Tissue System Tissue : In unicellular organisms a single cell does all the functions. There is no chance of division of labour on the basis of cell. In contrast, this kind of division is found in multicellular living body. In this case, it is observed that a group of cells performs the duty of manufacturing food; another group stores it, while the other group conducts the transport of food materials. There is further a group of cells that gives mechanical strenght to some organs. In many cases it is observed that a group of cells originating from a single origin remain closely attached in a place and collectively perform a similar type of function. This type of cells in a group is called tissue. In multicellular organisms division of labour is the main cause of formation of tissue. Types of Tissue : Cells of all tissues do not have the power of cell division but some of them have. Therefore tissues are of two types in terms of t...
Read more