Human Biology
MCQ
Unit 1
1. What is the name of this cell
structure?
A.
B.
C.
D.
Golgi body
Mitochondrion
Lysosome
Ribosome
2. Which of the following tissues is
rich in both actin and myosin
A.
B.
C.
D.
Muscle tissue
Liver tissue
Nerve tissue
Adipose tissue
3. Endocytosis is best described as:
A. The uptake of a substance by a cell by
active transport
B. The export of a substance through a
cell membrane
C. The uptake of a substance in a vesicle
formed by the cell membrane
D. The diffusion of a substance along a
concentration gradient
4. The specificity of an enzyme is
determined by the
A.
B.
C.
D.
Presence of an inhibitor
Substrate concentration
State of equilibrium of the reaction
Molecular structures of substrate and
enzyme
5. Which of the following cells
secretes antibodies?
A.
B.
C.
D.
Bacteria
Macrophages
T lymphocytes
B lymphocytes
6. In a human liver cell the mass of DNA
is 6.6 units. A human cell with 3.3 units
of DNA could be:
A.
B.
C.
D.
A kidney tubule cell
An ovum
A mature red blood cell
A nerve cell
7. In a human liver cell the mass of DNA
is 6.6 units. A human cell with 0 units of
DNA could be
A.
B.
C.
D.
A sperm
An ovum
A mature red blood cell
A nerve cell
8. Haploid gametes are produced during
meiosis as a result of:
A. The separation of homologous
chromosomes
B. The independent assortment of
chromosomes
C. The separation of chromosomes into
chromatids
D. The crossing over of chromatids
9. Red-green colour blindness is a sex- linked
recessive trait. A woman whose father is colour
blind marries a man with normal vision.
If they have a daughter what are the chances that
she will be colour blind?
A.
B.
C.
D.
0%
25%
33%
50%
10. Identical twins can result from:
A. Two haploid eggs fertilised by two
identical sperm
B. A haploid egg fertilised by two
identical sperm
C. A diploid egg fertilised by a single
sperm
D. A haploid egg fertilised by a single
sperm
11. The cell shown is magnified 300x.
What is the actual size of the cell?
A.
B.
C.
D.
6 m
60 m
54 m
540 m
18mm
12. In respiration the sequence of
reactions resulting in the conversion of
glucose to pyruvic acid is called:
A.
B.
C.
D.
The cytochrome system
The TCA cycle
The Krebs cycle
Glycolysis
13. A DNA molecule could be formed
from a molecule of phosphate together
with:
A.
B.
C.
D.
Ribose sugar and guanine
Ribose sugar and uracil
Deoxyribose sugar and guanine
Deoxyribose sugar and uracil
14. If a DNA molecule contains 8000
nucleotides of which 20% are adenine,
then the number of guanine nucleotides
present is:
A.
B.
C.
D.
1600
2000
2400
3200
15. A section of DNA has the sequence:
AATCGCTTC
Identify the 3 anticodons complementary
to the mRNA molecule transcribed from
this DNA
A.
B.
C.
D.
AAU CGC UUC
AAT CGC TTC
TTA GCG AAG
UUA GCG AAG
16. The cell organelle shown is
magnified ten thousand times.
What is its real size?
A.
B.
C.
D.
0.04 m
0.4 m
4 m
40 m
40mm
17. A sperm with a chromosome
complement of 23+X fertilises a normal
haploid egg. The resulting zygote would:
A.
B.
C.
D.
Be female with a chromosome number of 24
Be female with a chromosome number of 46
Be male with a chromosome number of 46
Be female with a chromosome number of 47
18. The cell membrane is chiefly
composed of:
A.
B.
C.
D.
Carbohydrates and lipids
Carbohydrates and proteins
Proteins and lipids
Carbohydrates and nucleic acids
19.Which of the following must be
present for glycolysis to occur?
A.
B.
C.
D.
Glucose and oxygen
ATP and oxygen
Glucose and ATP
ATP and pyruvic acid
20. Glycolysis takes place in the:
A.
B.
C.
D.
Nucleus
Cristae of the mitochondria
Matrix of the mitochondria
cytoplasm