EduNinjaTwo functions of the alimentary canal are mechanical digestion and chemical digestion.
Substances that are absorbed from the alimentary canal may enter cells and become part of the cells.
State the storage carbohydrate made from glucose in liver cells.
The main component of milk is a liquid that is an important solvent in the body.
State the name of this solvent.
Enzymes are used in genetic engineering.
The process of genetic engineering often starts with the steps shown in Fig. 1.1.
Fig. 1.1
State the sequence of bases on the lower strand of the DNA molecule in step 1.
Enzymes are catalysts.
Enzymes are proteins.
State the names of the chemical elements found in all proteins.
Which diagram shows the structure of DNA?
The bases on one of the strands of a DNA molecule have the sequence shown.
A-A-T-C-T-G
What is the corresponding sequence of bases on the other strand?
A-A-T-C-T-G
C-C-G-A-G-T
G-G-C-T-C-A
T-T-A-G-A-C
What are the smaller basic units of starch and glycogen molecules?
starch
glycogen
amino acids
fatty acids and glycerol
amino acids
glucose
glucose
fatty acids and glycerol
glucose
glucose
The diagram shows a section of DNA, with four bases identified on one strand.
Which sequence of bases would be on the other strand, starting from the top?
AGTC
CTGA
GACT
TCAG
The diagram shows the order of bases along part of one strand of DNA.
What is the order of bases on the corresponding part of the other strand?
A-C-T-T-A-G-A-T
C-A-G-G-C-T-C-G
T-A-G-A-T-T-C-A
T-G-A-A-T-C-T-A
Which substances are made by linking together glucose molecules only?
cellulose, glycogen and starch
fats, cellulose and proteins
proteins, oils and glycogen
starch, fats and oils