IB Bio

Which is the most correct statement about chlorophyll?

• Absorbs red and blue light.

• Reflects red and blue light, and absorbs green light.

• Absorbs the full spectrum of light equally.

• Only absorbs blue light.

Tags

NGSS.MS-LS1-6

Which of the following statements only apply to RNA? I. The molecule is in the shape of a double helix, with antiparallel strands II. The four bases are adenine, cytosine, guanine, thymine III. Ribose is present as the pentose sugar in its nucleotides IV. It is a polymer formed by the linkage of many nucleotides

• I and III

• I, II and IV

• II, III and IV

• III and IV

At the end of a week of running the Miller-Urey experiment, _______________ were found in the experimental chamber.

• amino acids

• polypeptides

• chains of amino acids

• proteins

Tags

NGSS.HS-LS1-6

The theory that mitochondria and chloroplasts originated as symbioses between separate single-celled organisms is known as

• endoeukaryotic theory.

• exosymbiotic theory.

• endosymbiotic theory.

• exoeukaryotic theory.

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-1

Which is NOT a piece of evidence supporting the endosymbiotic theory?

• Mitochondria and chloroplasts have their own DNA.

• Mitochondria and chloroplasts have ribosomes similar in size to prokaryotic ribosomes.

• The inner membranes of mitochondria and chloroplasts have proteins similar to prokaryotes.

• Mitochondria and chloroplasts are roughly the same size as the nucleus.

Tags

NGSS.HS-LS4-1

The Miller Urey experiment used __________ to simulate electrical storms.

• electrodes

• a light bulb

• heated water to create water vapour

• radiation

The benefit of a cell membrane includes

• formation of an internal environment in which optimal conditions can be maintained.

• the rigid structure forms a protective layer.

• allowing any materials to free flow in and out of the internal environment.

Tags

NGSS.MS-LS1-2

The formation of membrane-bound organelles such as a the nucleus and rER is likely due to

• infoldings in the external membrane that then pinched off.

• a mutualistic relationship with a proteobacterium.

• transcription by DNA into mRNA.

• supercoiling of the nucleoid region.

The prokaryotic cell which evolved into the first mitochondria is hypothesized to have been an

• aerobic bacterium.

• anaerobic bacterium.

Tags

NGSS.HS-LS4-2

Louis Pasteur's experiment was set up to either accept or reject the hypothesis of

• common ancestry.

• organic molecules forming from simpler molecules.

• electrical storms.

• spontaneous generation.