Ch 5, Lessons 1-3, 7th Grade Question Preview (ID: 60596)


DNA. TEACHERS: click here for quick copy question ID numbers.

What kind of sugar is in DNA?
a) deoxyribose
b) phosphate
c) ribose
d) guanine

Which nitrogen base pairing is correct?
a) CG
b) TC
c) GT
d) AG

RNA differs from DNA in that
a) All answers are correct
b) RNA has one strand
c) RNA contains a different sugar molecule
d) RNA has uracil instead of thymine

Uracil pairs with
a) adenine
b) thymine
c) cytosine
d) guanine

A protein is a chain of
a) amino acids
b) genes
c) chromosomes
d) fats

A mass of cancer cells is called a
a) tumor
b) cyst
c) bruise
d) contusion

How do we usually name cancer?
a) where it started in the body
b) where it spread in the body
c) how big the tumor is
d) none of the above

Chemotherapy affects normal cells as well as cancerous cells.
a) true
b) false
c)
d)

___ carries the info from the genetic code out of the nucleus and into the cytoplasm
a) messenger RNA
b) transfer RNA
c) carrier RNA
d) postal RNA

Each ___ on a chromosome contains the information to conde for one specific protein.
a) gene
b) chromosome
c) base
d) helix

___determine a variety of traits, from hair color to an organism's ability to digest food.
a) proteins
b) cells
c) nerves
d) bases

DNA can be found in all cells in the body except
a) red blood cells
b) skin cells
c) white blood cells
d) muscle cells

How many bases code for one amino acid?
a) 3
b) 2
c) 4
d) 5

The order of the base code units determines the order in which amino acids are put together to form a protein.
a) true
b) false
c)
d)

The process in which an identical copy of a DNA strand is formed for a new cell.
a) DNA replication
b) DNA synthesis
c) DNA extraction
d) protein synthesis

A mutation can cause a cell to produce an incorrect
a) protein
b) blood cell
c) chromosome
d) nucleus

When can mutations occur?
a) both
b) when chromosomes don't separate properly
c) mistakes in the DNA replication process
d)

A mutation that makes it difficult for an animal to catch prey would be considered
a) harmful
b) helpful
c) neither helpful nor harmful
d)

There are more than ___ types of cancer.
a) 100
b) 50
c) 200
d) 175

Factors that can determine if a person gets cancer include
a) all
b) genetics
c) substances in the environment
d) high-fat diets

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