Which of the following molecules is not found in plants?

Which of the following molecules is not found in plants?

(a) cellulose
(b) lignin
(c) collagen
(d) pectin

Answer: 

Which of the following statements about plant cell walls is true?

Which of the following statements about plant cell walls is true?

(a) The microtubule cytoskeleton directs the orientation in which cellulose is deposited in the cell wall.
(b) The molecular components of the cell wall are the same in all plant tissues.
(c) Because plant cell walls are rigid, they are not deposited until the cell has stopped growing.
(d) The cellulose found in cell walls is produced as a precursor molecule in the cell and delivered to the extracellular space by exocytosis.

Answer: 

Both multicellular plants and animals have _______.

Both multicellular plants and animals have _______.

(a) cells capable of locomotion.
(b) cells with cell walls.
(c) a cytoskeleton composed of actin filaments, microtubules, and intermediate filaments.
(d) tissues composed of multiple different cell types.

Answer: 

Finding co-inheritance of a SNP variant and a disease tells scientists that _________.

Finding co-inheritance of a SNP variant and a disease tells scientists that _________.

(a) everybody who carries this SNP will get the disease.
(b) sequences within the SNP cause the disease.
(c) a gene important for causing the disease is linked to the SNP.
(d) SNPs on other chromosomes will not be co-inherited with the disease.

Answer: 

Which of the following statements about genome-wide association studies (GWAS) is false?

Which of the following statements about genome-wide association studies (GWAS) is false?

(a) GWAS use SNPs to compare populations of people with disease and people without disease to look for SNPs more likely to be present in those with disease.
(b) GWAS can be used even if more than one gene can cause the disease of interest.
(c) Sometimes GWAS will identify SNPs that are associated with a disease but these SNPs do not affect the gene product of the gene that causes the disease.
(d) Studies using GWAS only examine SNPs that occur very rarely (<0.001%) in the population, as those SNPs are most likely to cause disease.

Answer: 

The single-nucleotide polymorphisms found in the human population ____.

The single-nucleotide polymorphisms found in the human population ____.

(a) are important for genetic mapping because they represent mutations in genes important for human disease.
(b) are rarely found among blood relatives.
(c) can be linked into haplotype blocks.
(d) arose mainly during the past 10,000 years.

Answer: 

Haplotype blocks can be seen in humans because _______.

Haplotype blocks can be seen in humans because _______.

(a) disease genes are found in haplotype blocks.
(b) modern humans descended from a relatively small population of about 10,000 individuals that existed about two thousand generations ago.
(c) some of our human ancestors interbred with Neanderthals.
(d) new mutations cannot be introduced into existing haplotype blocks.

Answer: