5. GENETICS - ONLINE QUIZ PRACTICE - FORM 4 - Ombiology4u

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5. GENETICS - ONLINE QUIZ PRACTICE - FORM 4 - Ombiology4u - Ahmed Omaar

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Chapter 5: Genetics - Form 4 Ombiology Online Quiz Part One

Multiple Choice Questions - Click the Correct Answer.
Note: After you done the exam, simple click the submit button at the end to get you score.
Fiiro gaar ah: Markaad dhameyso imtixaanka, guji SUBMIT xaga ugu hooseysa, kadibna guji VIEW SCORE si aad u hesho natiijadaada iyo su'alaha aad saxdey ama qaladey.

1. _______________ is the study of inheritance and how the characteristics of living things are transmitted from one generation to the next. *

1 point

Chromosomes

Gene

Genome

Genetics

2. Which of the following is a unit of heredity composed of deoxyribonucleic acid (DNA) material on the chromosome? *

1 point

RNA

Allele

Gene

Genotype

3. _________ is the passing of genetic traits from parents to their offspring. *

1 point

Genetics

Gene

Heredity

Histology

4. The organism's complete set of DNA including al of its genes is known as *

1 point

Gene

Genetics

Geology

Genome

5. Which of the following bases pairs with guanine? *

1 point

Adenine

Cytosine

Uracil

Thymine

6. Which DNA strand below represents the complementary base sequence of a DNA strand represented in the below DNA strand diagram? *

1 point

CATGAC

ATGCTA

TCGCAT

TAGCAT

7. Which of the following is not a component of the DNA molecule? *

1 point

Adenine

Cytosine

Uracil

Guanine

8. If one strand of DNA contains ATGCC bases, the complementary strand would contain; *

1 point

CCGTA

TACGG

GGCAT

GCATT

9. RNA molecule contains the following, except *

1 point

One chain of nucleotide

Base uracil

Sugar ribose

Sugar deoxyribose

10. Which of the following nucleotides in the below diagram contains a nucleotide with a nitrogenous base that pairs with thymine in double-strand DNA *

0 points

11. The following diagram shows a section of a DNA molecule. Name the parts labeled R, S and Y *

1 point

R is ribose sugar, S is a base, Y is uracil

R is pentose sugar, S is phosphate, Y is cytosine

R is deoxyribose sugar, S is phosphate, Y is thymine

R is deoxyribose sugar, S is phosphate, Y is guanine

12. Which of the following will contain a haploid number of chromosomes? *

1 point

Bacterium

Pollen grain

Neuron

Palisade cell

13. Uracil is only found in *

1 point

DNA

RNA

All genes

Proteins

14. The diagram below represents a portion of an organic molecule. This molecule controls cellular activity by directing the synthesis of *

1 point

Carbohydrates

Fats

Minerals

Proteins

15. Which is the sugar component of a RNA nucleotide? *

1 point

Phosphate

Deoxyribose

Ribose

Glucose

16. The nitrogenous base Adenine can pair with *

1 point

Adenine

Cytosine

Guanine

Thymine

17. DNA strands run _________ in relation to each other. *

1 point

Parallel

Perpendicular

Antiparallel

Horizontal

18. The structure of DNA is a ________ *

1 point

Single helical chain

Ring of nitrogen bases

Chain of sugar and phosphate

Double helix

19. Between the two strands of a DNA segment, the nitrogen bases are held together by ________ *

1 point

Covalent bond

Metallic bond

Ionic bond

Hydrogen bond

20. A nucleotide in DNA is composed of ____ *

1 point

a deoxyribose sugar, a phosphate and a nitrogen base

only a deoxyribose sugar and a nitrogen base

only a deoxyribose sugar and a phosphate

a ribose sugar, a phosphate and a nitrogen base

21. In human, the eggs produced by the female X chromosomes. So females are *

1 point

heterogametic

homogametic

gametogenic

hybrid

22. Which of the following is an example of discontinuous variation? *

1 point

Gestation period in the elephant

Body weight of impala

Leaf length in acacia

Number of toes in humans

22. Mutations are changes in the *

1 point

Sugar-phosphate backbone of DNA

Base-pairing rules for DNA

Sequences of bases in DNA

Color of the skin

23. What are the four nitrogenous bases found in RNA? *

1 point

U, T, G, C

A, U, G, C

A, G, C, T

A, T, G, C

24. Human blood group are determined by *

1 point

Genes

Allele

Nucleotides

Chromosomes

25. Skin color in humans is an example of *

1 point

discontinuous variation

Co-dominance

polygenic inheritance

random assortment

26. Meiosis is *

1 point

The stages of division in mitosis

The types of reproduction namely asexual and sexual

The types of cell division that gives rise to four reproductive cells (gametes)

The external fertilization

27. The DNA strand that is synthesized discontinuously is called the *

1 point

The leading strand

Sense strand

Lagging strand

Active strand

28. Purine bases are *

1 point

Single ringed structures

Multi-ringed structures

Triple ringed structures

Double ringed structures

29. The diagram below represents part of an organic molecule. The structures labeled G, C, T and A represent *

1 point

Phosphate groups

Deoxyribose sugars

Nitrogenous bases

Ribose sugars

30. DNA synthesis and replication takes place during which phase? *

1 point

M phase

G2 phase

G1 phase

S phase

31. The molecule represented by the lettered symbols below is a *

1 point

Nucleotide

Nucleoside

Base pair

Nucleolus

32. The diagram below shows chromosomes in one of the mitotic phases in a cell. What are Y and Z? *

1 point

Y is centromere and Z is centriole

Y is centromere and Z is chromatid

Y is chromatid and Z is centromere

Y is chromatid and Z is centriole

33. In meiotic division, homologous chromosomes undergo synapsis forming bivalent in _________ *

1 point

interphase

prophase I

prophase II

metaphase I

34. A gene can be defined as, *

1 point

a small circular piece of DNA found in bacteria

an enzyme that joins DNA sections

the bonding of DNA fragments from a donor cell to the plastids

a section of DNA coding for a specific protein

35. Which of the following is the type of cell division that results in two daughter cells each having a nucleus containing the same number and kind of chromosomes as the mother cell? *

1 point

Cell division

Mitosis

Meiosis

Metaphase

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